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cfg80211: remove enum ieee80211_band
[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / marvell / mwifiex / scan.c
CommitLineData
5e6e3a92
BZ		 1/*
2 * Marvell Wireless LAN device driver: scan ioctl and command handling
3 *
65da33f5 4 * Copyright (C) 2011-2014, Marvell International Ltd.
5e6e3a92
BZ		 5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20#include "decl.h"
21#include "ioctl.h"
22#include "util.h"
23#include "fw.h"
24#include "main.h"
25#include "11n.h"
26#include "cfg80211.h"
27
28/* The maximum number of channels the firmware can scan per command */
29#define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14
30
658f37b7 31#define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4
5e6e3a92
BZ		 32
33/* Memory needed to store a max sized Channel List TLV for a firmware scan */
34#define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
35 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
36 *sizeof(struct mwifiex_chan_scan_param_set)))
37
38/* Memory needed to store supported rate */
39#define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
40 + HOSTCMD_SUPPORTED_RATES)
41
42/* Memory needed to store a max number/size WildCard SSID TLV for a firmware
43 scan */
44#define WILDCARD_SSID_TLV_MAX_SIZE \
45 (MWIFIEX_MAX_SSID_LIST_LENGTH * \
46 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
47 + IEEE80211_MAX_SSID_LEN))
48
49/* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
50#define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
51 + sizeof(struct mwifiex_ie_types_num_probes) \
52 + sizeof(struct mwifiex_ie_types_htcap) \
53 + CHAN_TLV_MAX_SIZE \
54 + RATE_TLV_MAX_SIZE \
55 + WILDCARD_SSID_TLV_MAX_SIZE)
56
57
58union mwifiex_scan_cmd_config_tlv {
59 /* Scan configuration (variable length) */
60 struct mwifiex_scan_cmd_config config;
61 /* Max allocated block */
62 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
63};
64
65enum cipher_suite {
66 CIPHER_SUITE_TKIP,
67 CIPHER_SUITE_CCMP,
68 CIPHER_SUITE_MAX
69};
70static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
73};
74static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
77};
78
79/*
80 * This function parses a given IE for a given OUI.
81 *
82 * This is used to parse a WPA/RSN IE to find if it has
83 * a given oui in PTK.
84 */
85static u8
86mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
87{
88 u8 count;
89
90 count = iebody->ptk_cnt[0];
91
92 /* There could be multiple OUIs for PTK hence
93 1) Take the length.
94 2) Check all the OUIs for AES.
95 3) If one of them is AES then pass success. */
96 while (count) {
97 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
98 return MWIFIEX_OUI_PRESENT;
99
100 --count;
101 if (count)
102 iebody = (struct ie_body *) ((u8 *) iebody +
103 sizeof(iebody->ptk_body));
104 }
105
106 pr_debug("info: %s: OUI is not found in PTK\n", __func__);
107 return MWIFIEX_OUI_NOT_PRESENT;
108}
109
110/*
111 * This function checks if a given OUI is present in a RSN IE.
112 *
113 * The function first checks if a RSN IE is present or not in the
114 * BSS descriptor. It tries to locate the OUI only if such an IE is
115 * present.
116 */
117static u8
118mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
119{
270e58e8
YAP		 120 u8 *oui;
121 struct ie_body *iebody;
5e6e3a92
BZ		 122 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
123
124 if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
125 ieee_hdr.element_id == WLAN_EID_RSN))) {
126 iebody = (struct ie_body *)
127 (((u8 *) bss_desc->bcn_rsn_ie->data) +
cff23cec 128 RSN_GTK_OUI_OFFSET);
5e6e3a92
BZ		 129 oui = &mwifiex_rsn_oui[cipher][0];
130 ret = mwifiex_search_oui_in_ie(iebody, oui);
131 if (ret)
132 return ret;
133 }
134 return ret;
135}
136
137/*
138 * This function checks if a given OUI is present in a WPA IE.
139 *
140 * The function first checks if a WPA IE is present or not in the
141 * BSS descriptor. It tries to locate the OUI only if such an IE is
142 * present.
143 */
144static u8
145mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
146{
270e58e8
YAP		 147 u8 *oui;
148 struct ie_body *iebody;
5e6e3a92
BZ		 149 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
150
cff23cec
YAP		 151 if (((bss_desc->bcn_wpa_ie) &&
152 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
04b2312a 153 WLAN_EID_VENDOR_SPECIFIC))) {
5e6e3a92
BZ		 154 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
155 oui = &mwifiex_wpa_oui[cipher][0];
156 ret = mwifiex_search_oui_in_ie(iebody, oui);
157 if (ret)
158 return ret;
159 }
160 return ret;
161}
162
163/*
164 * This function compares two SSIDs and checks if they match.
165 */
166s32
b9be5f39 167mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
5e6e3a92
BZ		 168{
169 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
170 return -1;
171 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
172}
173
5e6e3a92
BZ		 174/*
175 * This function checks if wapi is enabled in driver and scanned network is
176 * compatible with it.
177 */
178static bool
cff23cec
YAP		 179mwifiex_is_bss_wapi(struct mwifiex_private *priv,
180 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92
BZ		 181{
182 if (priv->sec_info.wapi_enabled &&
183 (bss_desc->bcn_wapi_ie &&
184 ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
185 WLAN_EID_BSS_AC_ACCESS_DELAY))) {
186 return true;
187 }
188 return false;
189}
190
191/*
192 * This function checks if driver is configured with no security mode and
193 * scanned network is compatible with it.
194 */
195static bool
cff23cec
YAP		 196mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
197 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 198{
5eb02e44
AK		 199 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
200 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
5e6e3a92 201 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
04b2312a 202 WLAN_EID_VENDOR_SPECIFIC)) &&
cff23cec 203 ((!bss_desc->bcn_rsn_ie) ||
5e6e3a92 204 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
cff23cec
YAP		 205 WLAN_EID_RSN)) &&
206 !priv->sec_info.encryption_mode && !bss_desc->privacy) {
5e6e3a92
BZ		 207 return true;
208 }
209 return false;
210}
211
212/*
213 * This function checks if static WEP is enabled in driver and scanned network
214 * is compatible with it.
215 */
216static bool
cff23cec
YAP		 217mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
218 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 219{
5eb02e44
AK		 220 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
221 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
5e6e3a92
BZ		 222 return true;
223 }
224 return false;
225}
226
227/*
228 * This function checks if wpa is enabled in driver and scanned network is
229 * compatible with it.
230 */
231static bool
cff23cec
YAP		 232mwifiex_is_bss_wpa(struct mwifiex_private *priv,
233 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 234{
5eb02e44
AK		 235 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
236 !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
04b2312a
AS		 237 ((*(bss_desc->bcn_wpa_ie)).
238 vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC))
5e6e3a92
BZ		 239 /*
240 * Privacy bit may NOT be set in some APs like
241 * LinkSys WRT54G && bss_desc->privacy
242 */
243 ) {
acebe8c1
ZL		 244 mwifiex_dbg(priv->adapter, INFO,
245 "info: %s: WPA:\t"
246 "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\t"
247 "EncMode=%#x privacy=%#x\n", __func__,
248 (bss_desc->bcn_wpa_ie) ?
249 (*bss_desc->bcn_wpa_ie).
250 vend_hdr.element_id : 0,
251 (bss_desc->bcn_rsn_ie) ?
252 (*bss_desc->bcn_rsn_ie).
253 ieee_hdr.element_id : 0,
254 (priv->sec_info.wep_enabled) ? "e" : "d",
255 (priv->sec_info.wpa_enabled) ? "e" : "d",
256 (priv->sec_info.wpa2_enabled) ? "e" : "d",
257 priv->sec_info.encryption_mode,
258 bss_desc->privacy);
5e6e3a92
BZ		 259 return true;
260 }
261 return false;
262}
263
264/*
265 * This function checks if wpa2 is enabled in driver and scanned network is
266 * compatible with it.
267 */
268static bool
cff23cec
YAP		 269mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
270 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 271{
cff23cec
YAP		 272 if (!priv->sec_info.wep_enabled &&
273 !priv->sec_info.wpa_enabled &&
274 priv->sec_info.wpa2_enabled &&
275 ((bss_desc->bcn_rsn_ie) &&
276 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
277 /*
278 * Privacy bit may NOT be set in some APs like
279 * LinkSys WRT54G && bss_desc->privacy
280 */
acebe8c1
ZL		 281 mwifiex_dbg(priv->adapter, INFO,
282 "info: %s: WPA2:\t"
283 "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\t"
284 "EncMode=%#x privacy=%#x\n", __func__,
285 (bss_desc->bcn_wpa_ie) ?
286 (*bss_desc->bcn_wpa_ie).
287 vend_hdr.element_id : 0,
288 (bss_desc->bcn_rsn_ie) ?
289 (*bss_desc->bcn_rsn_ie).
290 ieee_hdr.element_id : 0,
291 (priv->sec_info.wep_enabled) ? "e" : "d",
292 (priv->sec_info.wpa_enabled) ? "e" : "d",
293 (priv->sec_info.wpa2_enabled) ? "e" : "d",
294 priv->sec_info.encryption_mode,
295 bss_desc->privacy);
5e6e3a92
BZ		 296 return true;
297 }
298 return false;
299}
300
301/*
302 * This function checks if adhoc AES is enabled in driver and scanned network is
303 * compatible with it.
304 */
305static bool
cff23cec
YAP		 306mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
307 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 308{
5eb02e44 309 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec
YAP		 310 !priv->sec_info.wpa2_enabled &&
311 ((!bss_desc->bcn_wpa_ie) ||
04b2312a
AS		 312 ((*(bss_desc->bcn_wpa_ie)).
313 vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
cff23cec
YAP		 314 ((!bss_desc->bcn_rsn_ie) ||
315 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
316 !priv->sec_info.encryption_mode && bss_desc->privacy) {
5e6e3a92
BZ		 317 return true;
318 }
319 return false;
320}
321
322/*
323 * This function checks if dynamic WEP is enabled in driver and scanned network
324 * is compatible with it.
325 */
326static bool
cff23cec
YAP		 327mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
328 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 329{
5eb02e44 330 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec
YAP		 331 !priv->sec_info.wpa2_enabled &&
332 ((!bss_desc->bcn_wpa_ie) ||
04b2312a
AS		 333 ((*(bss_desc->bcn_wpa_ie)).
334 vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
cff23cec
YAP		 335 ((!bss_desc->bcn_rsn_ie) ||
336 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
337 priv->sec_info.encryption_mode && bss_desc->privacy) {
acebe8c1
ZL		 338 mwifiex_dbg(priv->adapter, INFO,
339 "info: %s: dynamic\t"
340 "WEP: wpa_ie=%#x wpa2_ie=%#x\t"
341 "EncMode=%#x privacy=%#x\n",
342 __func__,
343 (bss_desc->bcn_wpa_ie) ?
344 (*bss_desc->bcn_wpa_ie).
345 vend_hdr.element_id : 0,
346 (bss_desc->bcn_rsn_ie) ?
347 (*bss_desc->bcn_rsn_ie).
348 ieee_hdr.element_id : 0,
349 priv->sec_info.encryption_mode,
350 bss_desc->privacy);
5e6e3a92
BZ		 351 return true;
352 }
353 return false;
354}
355
356/*
357 * This function checks if a scanned network is compatible with the driver
358 * settings.
359 *
360 * WEP WPA WPA2 ad-hoc encrypt Network
361 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
362 * 0 0 0 0 NONE 0 0 0 yes No security
363 * 0 1 0 0 x 1x 1 x yes WPA (disable
364 * HT if no AES)
365 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
366 * HT if no AES)
367 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
368 * 1 0 0 0 NONE 1 0 0 yes Static WEP
369 * (disable HT)
370 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
371 *
372 * Compatibility is not matched while roaming, except for mode.
373 */
374static s32
7c6fa2a8
AK		 375mwifiex_is_network_compatible(struct mwifiex_private *priv,
376 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
5e6e3a92
BZ		 377{
378 struct mwifiex_adapter *adapter = priv->adapter;
5e6e3a92 379
5e6e3a92
BZ		 380 bss_desc->disable_11n = false;
381
382 /* Don't check for compatibility if roaming */
cff23cec
YAP		 383 if (priv->media_connected &&
384 (priv->bss_mode == NL80211_IFTYPE_STATION) &&
385 (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
7c6fa2a8 386 return 0;
5e6e3a92
BZ		 387
388 if (priv->wps.session_enable) {
acebe8c1
ZL		 389 mwifiex_dbg(adapter, IOCTL,
390 "info: return success directly in WPS period\n");
7c6fa2a8 391 return 0;
5e6e3a92
BZ		 392 }
393
2a7305c8 394 if (bss_desc->chan_sw_ie_present) {
acebe8c1
ZL		 395 mwifiex_dbg(adapter, INFO,
396 "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
2a7305c8
AK		 397 return -1;
398 }
399
cff23cec 400 if (mwifiex_is_bss_wapi(priv, bss_desc)) {
acebe8c1
ZL		 401 mwifiex_dbg(adapter, INFO,
402 "info: return success for WAPI AP\n");
7c6fa2a8 403 return 0;
5e6e3a92
BZ		 404 }
405
406 if (bss_desc->bss_mode == mode) {
cff23cec 407 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
5e6e3a92 408 /* No security */
7c6fa2a8 409 return 0;
cff23cec 410 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
5e6e3a92 411 /* Static WEP enabled */
acebe8c1
ZL		 412 mwifiex_dbg(adapter, INFO,
413 "info: Disable 11n in WEP mode.\n");
5e6e3a92 414 bss_desc->disable_11n = true;
7c6fa2a8 415 return 0;
cff23cec 416 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
5e6e3a92 417 /* WPA enabled */
cff23cec
YAP		 418 if (((priv->adapter->config_bands & BAND_GN ||
419 priv->adapter->config_bands & BAND_AN) &&
420 bss_desc->bcn_ht_cap) &&
421 !mwifiex_is_wpa_oui_present(bss_desc,
422 CIPHER_SUITE_CCMP)) {
423
424 if (mwifiex_is_wpa_oui_present
425 (bss_desc, CIPHER_SUITE_TKIP)) {
acebe8c1
ZL		 426 mwifiex_dbg(adapter, INFO,
427 "info: Disable 11n if AES\t"
428 "is not supported by AP\n");
5e6e3a92
BZ		 429 bss_desc->disable_11n = true;
430 } else {
431 return -1;
432 }
433 }
7c6fa2a8 434 return 0;
cff23cec 435 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
5e6e3a92 436 /* WPA2 enabled */
cff23cec
YAP		 437 if (((priv->adapter->config_bands & BAND_GN ||
438 priv->adapter->config_bands & BAND_AN) &&
439 bss_desc->bcn_ht_cap) &&
440 !mwifiex_is_rsn_oui_present(bss_desc,
441 CIPHER_SUITE_CCMP)) {
442
443 if (mwifiex_is_rsn_oui_present
444 (bss_desc, CIPHER_SUITE_TKIP)) {
acebe8c1
ZL		 445 mwifiex_dbg(adapter, INFO,
446 "info: Disable 11n if AES\t"
447 "is not supported by AP\n");
5e6e3a92
BZ		 448 bss_desc->disable_11n = true;
449 } else {
450 return -1;
451 }
452 }
7c6fa2a8 453 return 0;
cff23cec 454 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
5e6e3a92 455 /* Ad-hoc AES enabled */
7c6fa2a8 456 return 0;
cff23cec 457 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
5e6e3a92 458 /* Dynamic WEP enabled */
7c6fa2a8 459 return 0;
5e6e3a92
BZ		 460 }
461
462 /* Security doesn't match */
acebe8c1
ZL		 463 mwifiex_dbg(adapter, ERROR,
464 "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s\t"
465 "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n",
466 __func__,
467 (bss_desc->bcn_wpa_ie) ?
468 (*bss_desc->bcn_wpa_ie).vend_hdr.element_id : 0,
469 (bss_desc->bcn_rsn_ie) ?
470 (*bss_desc->bcn_rsn_ie).ieee_hdr.element_id : 0,
471 (priv->sec_info.wep_enabled) ? "e" : "d",
472 (priv->sec_info.wpa_enabled) ? "e" : "d",
473 (priv->sec_info.wpa2_enabled) ? "e" : "d",
474 priv->sec_info.encryption_mode, bss_desc->privacy);
5e6e3a92
BZ		 475 return -1;
476 }
477
478 /* Mode doesn't match */
479 return -1;
480}
481
5e6e3a92
BZ		 482/*
483 * This function creates a channel list for the driver to scan, based
484 * on region/band information.
485 *
486 * This routine is used for any scan that is not provided with a
487 * specific channel list to scan.
488 */
658f37b7 489static int
5e6e3a92 490mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
cff23cec
YAP		 491 const struct mwifiex_user_scan_cfg
492 *user_scan_in,
493 struct mwifiex_chan_scan_param_set
494 *scan_chan_list,
495 u8 filtered_scan)
5e6e3a92 496{
57fbcce3 497 enum nl80211_band band;
5e6e3a92
BZ		 498 struct ieee80211_supported_band *sband;
499 struct ieee80211_channel *ch;
500 struct mwifiex_adapter *adapter = priv->adapter;
501 int chan_idx = 0, i;
5e6e3a92 502
57fbcce3 503 for (band = 0; (band < NUM_NL80211_BANDS) ; band++) {
5e6e3a92 504
4facc34a 505 if (!priv->wdev.wiphy->bands[band])
5e6e3a92
BZ		 506 continue;
507
4facc34a 508 sband = priv->wdev.wiphy->bands[band];
5e6e3a92 509
d06b7b9e 510 for (i = 0; (i < sband->n_channels) ; i++) {
5e6e3a92
BZ		 511 ch = &sband->channels[i];
512 if (ch->flags & IEEE80211_CHAN_DISABLED)
513 continue;
514 scan_chan_list[chan_idx].radio_type = band;
186630c2 515
5e6e3a92 516 if (user_scan_in &&
cff23cec 517 user_scan_in->chan_list[0].scan_time)
5e6e3a92
BZ		 518 scan_chan_list[chan_idx].max_scan_time =
519 cpu_to_le16((u16) user_scan_in->
520 chan_list[0].scan_time);
8fe02e16 521 else if (ch->flags & IEEE80211_CHAN_NO_IR)
5e6e3a92
BZ		 522 scan_chan_list[chan_idx].max_scan_time =
523 cpu_to_le16(adapter->passive_scan_time);
524 else
525 scan_chan_list[chan_idx].max_scan_time =
526 cpu_to_le16(adapter->active_scan_time);
186630c2 527
8fe02e16 528 if (ch->flags & IEEE80211_CHAN_NO_IR)
5e6e3a92 529 scan_chan_list[chan_idx].chan_scan_mode_bitmap
2375fa2b 530 |= (MWIFIEX_PASSIVE_SCAN |
531 MWIFIEX_HIDDEN_SSID_REPORT);
5e6e3a92
BZ		 532 else
533 scan_chan_list[chan_idx].chan_scan_mode_bitmap
534 &= ~MWIFIEX_PASSIVE_SCAN;
535 scan_chan_list[chan_idx].chan_number =
536 (u32) ch->hw_value;
537 if (filtered_scan) {
538 scan_chan_list[chan_idx].max_scan_time =
539 cpu_to_le16(adapter->specific_scan_time);
540 scan_chan_list[chan_idx].chan_scan_mode_bitmap
541 |= MWIFIEX_DISABLE_CHAN_FILT;
542 }
d06b7b9e 543 chan_idx++;
5e6e3a92
BZ		 544 }
545
546 }
658f37b7 547 return chan_idx;
5e6e3a92
BZ		 548}
549
0c9b7f22
XH		 550/* This function creates a channel list tlv for bgscan config, based
551 * on region/band information.
552 */
553static int
554mwifiex_bgscan_create_channel_list(struct mwifiex_private *priv,
555 const struct mwifiex_bg_scan_cfg
556 *bgscan_cfg_in,
557 struct mwifiex_chan_scan_param_set
558 *scan_chan_list)
559{
57fbcce3 560 enum nl80211_band band;
0c9b7f22
XH		 561 struct ieee80211_supported_band *sband;
562 struct ieee80211_channel *ch;
563 struct mwifiex_adapter *adapter = priv->adapter;
564 int chan_idx = 0, i;
565
57fbcce3 566 for (band = 0; (band < NUM_NL80211_BANDS); band++) {
0c9b7f22
XH		 567 if (!priv->wdev.wiphy->bands[band])
568 continue;
569
570 sband = priv->wdev.wiphy->bands[band];
571
572 for (i = 0; (i < sband->n_channels) ; i++) {
573 ch = &sband->channels[i];
574 if (ch->flags & IEEE80211_CHAN_DISABLED)
575 continue;
576 scan_chan_list[chan_idx].radio_type = band;
577
578 if (bgscan_cfg_in->chan_list[0].scan_time)
579 scan_chan_list[chan_idx].max_scan_time =
580 cpu_to_le16((u16)bgscan_cfg_in->
581 chan_list[0].scan_time);
582 else if (ch->flags & IEEE80211_CHAN_NO_IR)
583 scan_chan_list[chan_idx].max_scan_time =
584 cpu_to_le16(adapter->passive_scan_time);
585 else
586 scan_chan_list[chan_idx].max_scan_time =
587 cpu_to_le16(adapter->
588 specific_scan_time);
589
590 if (ch->flags & IEEE80211_CHAN_NO_IR)
591 scan_chan_list[chan_idx].chan_scan_mode_bitmap
592 |= MWIFIEX_PASSIVE_SCAN;
593 else
594 scan_chan_list[chan_idx].chan_scan_mode_bitmap
595 &= ~MWIFIEX_PASSIVE_SCAN;
596
597 scan_chan_list[chan_idx].chan_number =
598 (u32)ch->hw_value;
599 chan_idx++;
600 }
601 }
602 return chan_idx;
603}
604
78dfca62
AP		 605/* This function appends rate TLV to scan config command. */
606static int
607mwifiex_append_rate_tlv(struct mwifiex_private *priv,
608 struct mwifiex_scan_cmd_config *scan_cfg_out,
609 u8 radio)
610{
611 struct mwifiex_ie_types_rates_param_set *rates_tlv;
612 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos;
613 u32 rates_size;
614
615 memset(rates, 0, sizeof(rates));
616
617 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len;
618
619 if (priv->scan_request)
620 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates,
621 radio);
622 else
623 rates_size = mwifiex_get_supported_rates(priv, rates);
624
acebe8c1
ZL		 625 mwifiex_dbg(priv->adapter, CMD,
626 "info: SCAN_CMD: Rates size = %d\n",
78dfca62
AP		 627 rates_size);
628 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos;
629 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
630 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
631 memcpy(rates_tlv->rates, rates, rates_size);
632 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size;
633
634 return rates_size;
635}
636
5e6e3a92
BZ		 637/*
638 * This function constructs and sends multiple scan config commands to
639 * the firmware.
640 *
641 * Previous routines in the code flow have created a scan command configuration
642 * with any requested TLVs. This function splits the channel TLV into maximum
643 * channels supported per scan lists and sends the portion of the channel TLV,
644 * along with the other TLVs, to the firmware.
645 */
646static int
600f5d90 647mwifiex_scan_channel_list(struct mwifiex_private *priv,
5e6e3a92
BZ		 648 u32 max_chan_per_scan, u8 filtered_scan,
649 struct mwifiex_scan_cmd_config *scan_cfg_out,
650 struct mwifiex_ie_types_chan_list_param_set
651 *chan_tlv_out,
652 struct mwifiex_chan_scan_param_set *scan_chan_list)
653{
1845bd3a 654 struct mwifiex_adapter *adapter = priv->adapter;
5e6e3a92
BZ		 655 int ret = 0;
656 struct mwifiex_chan_scan_param_set *tmp_chan_list;
657 struct mwifiex_chan_scan_param_set *start_chan;
1845bd3a
AK		 658 struct cmd_ctrl_node *cmd_node, *tmp_node;
659 unsigned long flags;
21f58d20 660 u32 tlv_idx, rates_size, cmd_no;
5e6e3a92
BZ		 661 u32 total_scan_time;
662 u32 done_early;
78dfca62 663 u8 radio_type;
5e6e3a92
BZ		 664
665 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
acebe8c1
ZL		 666 mwifiex_dbg(priv->adapter, ERROR,
667 "info: Scan: Null detect: %p, %p, %p\n",
668 scan_cfg_out, chan_tlv_out, scan_chan_list);
5e6e3a92
BZ		 669 return -1;
670 }
671
b887664d
AK		 672 /* Check csa channel expiry before preparing scan list */
673 mwifiex_11h_get_csa_closed_channel(priv);
674
5e6e3a92
BZ		 675 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
676
677 /* Set the temp channel struct pointer to the start of the desired
678 list */
679 tmp_chan_list = scan_chan_list;
680
681 /* Loop through the desired channel list, sending a new firmware scan
682 commands for each max_chan_per_scan channels (or for 1,6,11
683 individually if configured accordingly) */
684 while (tmp_chan_list->chan_number) {
685
686 tlv_idx = 0;
687 total_scan_time = 0;
78dfca62 688 radio_type = 0;
5e6e3a92
BZ		 689 chan_tlv_out->header.len = 0;
690 start_chan = tmp_chan_list;
691 done_early = false;
692
693 /*
694 * Construct the Channel TLV for the scan command. Continue to
695 * insert channel TLVs until:
696 * - the tlv_idx hits the maximum configured per scan command
697 * - the next channel to insert is 0 (end of desired channel
698 * list)
699 * - done_early is set (controlling individual scanning of
700 * 1,6,11)
701 */
cff23cec
YAP		 702 while (tlv_idx < max_chan_per_scan &&
703 tmp_chan_list->chan_number && !done_early) {
5e6e3a92 704
b887664d
AK		 705 if (tmp_chan_list->chan_number == priv->csa_chan) {
706 tmp_chan_list++;
707 continue;
708 }
709
78dfca62 710 radio_type = tmp_chan_list->radio_type;
acebe8c1
ZL		 711 mwifiex_dbg(priv->adapter, INFO,
712 "info: Scan: Chan(%3d), Radio(%d),\t"
713 "Mode(%d, %d), Dur(%d)\n",
714 tmp_chan_list->chan_number,
715 tmp_chan_list->radio_type,
716 tmp_chan_list->chan_scan_mode_bitmap
717 & MWIFIEX_PASSIVE_SCAN,
718 (tmp_chan_list->chan_scan_mode_bitmap
719 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
720 le16_to_cpu(tmp_chan_list->max_scan_time));
5e6e3a92
BZ		 721
722 /* Copy the current channel TLV to the command being
723 prepared */
724 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
725 tmp_chan_list,
726 sizeof(chan_tlv_out->chan_scan_param));
727
728 /* Increment the TLV header length by the size
729 appended */
5570a914
WY		 730 le16_add_cpu(&chan_tlv_out->header.len,
731 sizeof(chan_tlv_out->chan_scan_param));
5e6e3a92
BZ		 732
733 /*
734 * The tlv buffer length is set to the number of bytes
735 * of the between the channel tlv pointer and the start
736 * of the tlv buffer. This compensates for any TLVs
737 * that were appended before the channel list.
738 */
739 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
740 scan_cfg_out->tlv_buf);
741
742 /* Add the size of the channel tlv header and the data
743 length */
744 scan_cfg_out->tlv_buf_len +=
745 (sizeof(chan_tlv_out->header)
746 + le16_to_cpu(chan_tlv_out->header.len));
747
748 /* Increment the index to the channel tlv we are
749 constructing */
750 tlv_idx++;
751
752 /* Count the total scan time per command */
753 total_scan_time +=
754 le16_to_cpu(tmp_chan_list->max_scan_time);
755
756 done_early = false;
757
758 /* Stop the loop if the *current* channel is in the
759 1,6,11 set and we are not filtering on a BSSID
760 or SSID. */
cff23cec
YAP		 761 if (!filtered_scan &&
762 (tmp_chan_list->chan_number == 1 ||
763 tmp_chan_list->chan_number == 6 ||
764 tmp_chan_list->chan_number == 11))
5e6e3a92
BZ		 765 done_early = true;
766
767 /* Increment the tmp pointer to the next channel to
768 be scanned */
769 tmp_chan_list++;
770
771 /* Stop the loop if the *next* channel is in the 1,6,11
772 set. This will cause it to be the only channel
773 scanned on the next interation */
cff23cec
YAP		 774 if (!filtered_scan &&
775 (tmp_chan_list->chan_number == 1 ||
776 tmp_chan_list->chan_number == 6 ||
777 tmp_chan_list->chan_number == 11))
5e6e3a92
BZ		 778 done_early = true;
779 }
780
781 /* The total scan time should be less than scan command timeout
782 value */
783 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
acebe8c1
ZL		 784 mwifiex_dbg(priv->adapter, ERROR,
785 "total scan time %dms\t"
786 "is over limit (%dms), scan skipped\n",
787 total_scan_time,
788 MWIFIEX_MAX_TOTAL_SCAN_TIME);
5e6e3a92
BZ		 789 ret = -1;
790 break;
791 }
792
78dfca62
AP		 793 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out,
794 radio_type);
795
5e6e3a92
BZ		 796 priv->adapter->scan_channels = start_chan;
797
798 /* Send the scan command to the firmware with the specified
799 cfg */
21f58d20
AK		 800 if (priv->adapter->ext_scan)
801 cmd_no = HostCmd_CMD_802_11_SCAN_EXT;
802 else
803 cmd_no = HostCmd_CMD_802_11_SCAN;
804
fa0ecbb9
BZ		 805 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET,
806 0, scan_cfg_out, false);
78dfca62
AP		 807
808 /* rate IE is updated per scan command but same starting
809 * pointer is used each time so that rate IE from earlier
810 * scan_cfg_out->buf is overwritten with new one.
811 */
812 scan_cfg_out->tlv_buf_len -=
813 sizeof(struct mwifiex_ie_types_header) + rates_size;
814
1845bd3a
AK		 815 if (ret) {
816 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
817 list_for_each_entry_safe(cmd_node, tmp_node,
818 &adapter->scan_pending_q,
819 list) {
820 list_del(&cmd_node->list);
821 cmd_node->wait_q_enabled = false;
822 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
823 }
824 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
825 flags);
5e6e3a92 826 break;
1845bd3a 827 }
5e6e3a92
BZ		 828 }
829
830 if (ret)
831 return -1;
832
833 return 0;
834}
835
836/*
837 * This function constructs a scan command configuration structure to use
838 * in scan commands.
839 *
840 * Application layer or other functions can invoke network scanning
841 * with a scan configuration supplied in a user scan configuration structure.
842 * This structure is used as the basis of one or many scan command configuration
843 * commands that are sent to the command processing module and eventually to the
844 * firmware.
845 *
846 * This function creates a scan command configuration structure based on the
847 * following user supplied parameters (if present):
848 * - SSID filter
849 * - BSSID filter
850 * - Number of Probes to be sent
851 * - Channel list
852 *
853 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
854 * If the number of probes is not set, adapter default setting is used.
855 */
856static void
cff23cec
YAP		 857mwifiex_config_scan(struct mwifiex_private *priv,
858 const struct mwifiex_user_scan_cfg *user_scan_in,
859 struct mwifiex_scan_cmd_config *scan_cfg_out,
860 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
861 struct mwifiex_chan_scan_param_set *scan_chan_list,
862 u8 *max_chan_per_scan, u8 *filtered_scan,
863 u8 *scan_current_only)
5e6e3a92
BZ		 864{
865 struct mwifiex_adapter *adapter = priv->adapter;
866 struct mwifiex_ie_types_num_probes *num_probes_tlv;
cb91be87 867 struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv;
5e6e3a92 868 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
21f58d20 869 struct mwifiex_ie_types_bssid_list *bssid_tlv;
5e6e3a92
BZ		 870 u8 *tlv_pos;
871 u32 num_probes;
872 u32 ssid_len;
873 u32 chan_idx;
658f37b7 874 u32 chan_num;
5e6e3a92
BZ		 875 u32 scan_type;
876 u16 scan_dur;
877 u8 channel;
878 u8 radio_type;
be0b281e 879 int i;
5e6e3a92 880 u8 ssid_filter;
5e6e3a92 881 struct mwifiex_ie_types_htcap *ht_cap;
40d7412b 882 struct mwifiex_ie_types_bss_mode *bss_mode;
5e6e3a92
BZ		 883
884 /* The tlv_buf_len is calculated for each scan command. The TLVs added
885 in this routine will be preserved since the routine that sends the
886 command will append channelTLVs at *chan_list_out. The difference
887 between the *chan_list_out and the tlv_buf start will be used to
888 calculate the size of anything we add in this routine. */
889 scan_cfg_out->tlv_buf_len = 0;
890
891 /* Running tlv pointer. Assigned to chan_list_out at end of function
892 so later routines know where channels can be added to the command
893 buf */
894 tlv_pos = scan_cfg_out->tlv_buf;
895
896 /* Initialize the scan as un-filtered; the flag is later set to TRUE
897 below if a SSID or BSSID filter is sent in the command */
898 *filtered_scan = false;
899
900 /* Initialize the scan as not being only on the current channel. If
901 the channel list is customized, only contains one channel, and is
902 the active channel, this is set true and data flow is not halted. */
903 *scan_current_only = false;
904
905 if (user_scan_in) {
906
907 /* Default the ssid_filter flag to TRUE, set false under
908 certain wildcard conditions and qualified by the existence
909 of an SSID list before marking the scan as filtered */
910 ssid_filter = true;
911
912 /* Set the BSS type scan filter, use Adapter setting if
913 unset */
914 scan_cfg_out->bss_mode =
915 (user_scan_in->bss_mode ? (u8) user_scan_in->
916 bss_mode : (u8) adapter->scan_mode);
917
918 /* Set the number of probes to send, use Adapter setting
919 if unset */
920 num_probes =
921 (user_scan_in->num_probes ? user_scan_in->
922 num_probes : adapter->scan_probes);
923
924 /*
925 * Set the BSSID filter to the incoming configuration,
926 * if non-zero. If not set, it will remain disabled
927 * (all zeros).
928 */
929 memcpy(scan_cfg_out->specific_bssid,
930 user_scan_in->specific_bssid,
931 sizeof(scan_cfg_out->specific_bssid));
932
21f58d20
AK		 933 if (adapter->ext_scan &&
934 !is_zero_ether_addr(scan_cfg_out->specific_bssid)) {
935 bssid_tlv =
936 (struct mwifiex_ie_types_bssid_list *)tlv_pos;
937 bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID);
938 bssid_tlv->header.len = cpu_to_le16(ETH_ALEN);
939 memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid,
940 ETH_ALEN);
941 tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list);
942 }
943
be0b281e
AK		 944 for (i = 0; i < user_scan_in->num_ssids; i++) {
945 ssid_len = user_scan_in->ssid_list[i].ssid_len;
5e6e3a92
BZ		 946
947 wildcard_ssid_tlv =
948 (struct mwifiex_ie_types_wildcard_ssid_params *)
949 tlv_pos;
950 wildcard_ssid_tlv->header.type =
951 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
952 wildcard_ssid_tlv->header.len = cpu_to_le16(
953 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
954 max_ssid_length)));
fada1058 955
be0b281e
AK		 956 /*
957 * max_ssid_length = 0 tells firmware to perform
958 * specific scan for the SSID filled, whereas
959 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
960 * wildcard scan.
961 */
962 if (ssid_len)
963 wildcard_ssid_tlv->max_ssid_length = 0;
964 else
965 wildcard_ssid_tlv->max_ssid_length =
966 IEEE80211_MAX_SSID_LEN;
5e6e3a92 967
0c6303cc
AN		 968 if (!memcmp(user_scan_in->ssid_list[i].ssid,
969 "DIRECT-", 7))
970 wildcard_ssid_tlv->max_ssid_length = 0xfe;
971
5e6e3a92 972 memcpy(wildcard_ssid_tlv->ssid,
be0b281e 973 user_scan_in->ssid_list[i].ssid, ssid_len);
5e6e3a92
BZ		 974
975 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
976 + le16_to_cpu(wildcard_ssid_tlv->header.len));
977
acebe8c1
ZL		 978 mwifiex_dbg(adapter, INFO,
979 "info: scan: ssid[%d]: %s, %d\n",
980 i, wildcard_ssid_tlv->ssid,
981 wildcard_ssid_tlv->max_ssid_length);
5e6e3a92
BZ		 982
983 /* Empty wildcard ssid with a maxlen will match many or
984 potentially all SSIDs (maxlen == 32), therefore do
985 not treat the scan as
986 filtered. */
987 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
988 ssid_filter = false;
5e6e3a92
BZ		 989 }
990
991 /*
992 * The default number of channels sent in the command is low to
993 * ensure the response buffer from the firmware does not
994 * truncate scan results. That is not an issue with an SSID
995 * or BSSID filter applied to the scan results in the firmware.
996 */
cff23cec 997 if ((i && ssid_filter) ||
84f6a95a 998 !is_zero_ether_addr(scan_cfg_out->specific_bssid))
5e6e3a92 999 *filtered_scan = true;
8eda10ea
AP		 1000
1001 if (user_scan_in->scan_chan_gap) {
acebe8c1
ZL		 1002 mwifiex_dbg(adapter, INFO,
1003 "info: scan: channel gap = %d\n",
1004 user_scan_in->scan_chan_gap);
8eda10ea
AP		 1005 *max_chan_per_scan =
1006 MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
1007
1008 chan_gap_tlv = (void *)tlv_pos;
1009 chan_gap_tlv->header.type =
1010 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP);
1011 chan_gap_tlv->header.len =
1012 cpu_to_le16(sizeof(chan_gap_tlv->chan_gap));
1013 chan_gap_tlv->chan_gap =
1014 cpu_to_le16((user_scan_in->scan_chan_gap));
1015 tlv_pos +=
1016 sizeof(struct mwifiex_ie_types_scan_chan_gap);
1017 }
5e6e3a92
BZ		 1018 } else {
1019 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
1020 num_probes = adapter->scan_probes;
1021 }
1022
1023 /*
1024 * If a specific BSSID or SSID is used, the number of channels in the
1025 * scan command will be increased to the absolute maximum.
1026 */
1027 if (*filtered_scan)
1028 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
1029 else
658f37b7 1030 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
5e6e3a92 1031
40d7412b
AN		 1032 if (adapter->ext_scan) {
1033 bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos;
1034 bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE);
1035 bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode));
1036 bss_mode->bss_mode = scan_cfg_out->bss_mode;
1037 tlv_pos += sizeof(bss_mode->header) +
1038 le16_to_cpu(bss_mode->header.len);
1039 }
1040
5e6e3a92
BZ		 1041 /* If the input config or adapter has the number of Probes set,
1042 add tlv */
1043 if (num_probes) {
1044
acebe8c1
ZL		 1045 mwifiex_dbg(adapter, INFO,
1046 "info: scan: num_probes = %d\n",
1047 num_probes);
5e6e3a92
BZ		 1048
1049 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
1050 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
1051 num_probes_tlv->header.len =
1052 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
1053 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
1054
1055 tlv_pos += sizeof(num_probes_tlv->header) +
1056 le16_to_cpu(num_probes_tlv->header.len);
1057
1058 }
1059
cff23cec
YAP		 1060 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
1061 (priv->adapter->config_bands & BAND_GN ||
1062 priv->adapter->config_bands & BAND_AN)) {
5e6e3a92
BZ		 1063 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
1064 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
1065 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
1066 ht_cap->header.len =
1067 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
a46b7b5c
AK		 1068 radio_type =
1069 mwifiex_band_to_radio_type(priv->adapter->config_bands);
341b8800 1070 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
5e6e3a92
BZ		 1071 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
1072 }
1073
1074 /* Append vendor specific IE TLV */
1075 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
1076
1077 /*
1078 * Set the output for the channel TLV to the address in the tlv buffer
1079 * past any TLVs that were added in this function (SSID, num_probes).
1080 * Channel TLVs will be added past this for each scan command,
1081 * preserving the TLVs that were previously added.
1082 */
1083 *chan_list_out =
1084 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
1085
1086 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
1087
acebe8c1
ZL		 1088 mwifiex_dbg(adapter, INFO,
1089 "info: Scan: Using supplied channel list\n");
5e6e3a92
BZ		 1090
1091 for (chan_idx = 0;
cff23cec
YAP		 1092 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
1093 user_scan_in->chan_list[chan_idx].chan_number;
5e6e3a92
BZ		 1094 chan_idx++) {
1095
1096 channel = user_scan_in->chan_list[chan_idx].chan_number;
1097 (scan_chan_list + chan_idx)->chan_number = channel;
1098
1099 radio_type =
1100 user_scan_in->chan_list[chan_idx].radio_type;
1101 (scan_chan_list + chan_idx)->radio_type = radio_type;
1102
1103 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
1104
1105 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1106 (scan_chan_list +
1107 chan_idx)->chan_scan_mode_bitmap
2375fa2b 1108 |= (MWIFIEX_PASSIVE_SCAN |
1109 MWIFIEX_HIDDEN_SSID_REPORT);
5e6e3a92
BZ		 1110 else
1111 (scan_chan_list +
1112 chan_idx)->chan_scan_mode_bitmap
1113 &= ~MWIFIEX_PASSIVE_SCAN;
1114
f3e1af3e
AK		 1115 if (*filtered_scan)
1116 (scan_chan_list +
1117 chan_idx)->chan_scan_mode_bitmap
1118 |= MWIFIEX_DISABLE_CHAN_FILT;
1119
5e6e3a92
BZ		 1120 if (user_scan_in->chan_list[chan_idx].scan_time) {
1121 scan_dur = (u16) user_scan_in->
1122 chan_list[chan_idx].scan_time;
1123 } else {
1124 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1125 scan_dur = adapter->passive_scan_time;
1126 else if (*filtered_scan)
1127 scan_dur = adapter->specific_scan_time;
1128 else
1129 scan_dur = adapter->active_scan_time;
1130 }
1131
1132 (scan_chan_list + chan_idx)->min_scan_time =
1133 cpu_to_le16(scan_dur);
1134 (scan_chan_list + chan_idx)->max_scan_time =
1135 cpu_to_le16(scan_dur);
1136 }
1137
1138 /* Check if we are only scanning the current channel */
cff23cec
YAP		 1139 if ((chan_idx == 1) &&
1140 (user_scan_in->chan_list[0].chan_number ==
1141 priv->curr_bss_params.bss_descriptor.channel)) {
5e6e3a92 1142 *scan_current_only = true;
acebe8c1
ZL		 1143 mwifiex_dbg(adapter, INFO,
1144 "info: Scan: Scanning current channel only\n");
5e6e3a92 1145 }
658f37b7 1146 chan_num = chan_idx;
5e6e3a92 1147 } else {
acebe8c1
ZL		 1148 mwifiex_dbg(adapter, INFO,
1149 "info: Scan: Creating full region channel list\n");
658f37b7
AK		 1150 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
1151 scan_chan_list,
1152 *filtered_scan);
1153 }
1154
5e6e3a92
BZ		 1155}
1156
1157/*
1158 * This function inspects the scan response buffer for pointers to
1159 * expected TLVs.
1160 *
1161 * TLVs can be included at the end of the scan response BSS information.
1162 *
1163 * Data in the buffer is parsed pointers to TLVs that can potentially
1164 * be passed back in the response.
1165 */
1166static void
1167mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1168 struct mwifiex_ie_types_data *tlv,
1169 u32 tlv_buf_size, u32 req_tlv_type,
1170 struct mwifiex_ie_types_data **tlv_data)
1171{
1172 struct mwifiex_ie_types_data *current_tlv;
1173 u32 tlv_buf_left;
1174 u32 tlv_type;
1175 u32 tlv_len;
1176
1177 current_tlv = tlv;
1178 tlv_buf_left = tlv_buf_size;
1179 *tlv_data = NULL;
1180
acebe8c1
ZL		 1181 mwifiex_dbg(adapter, INFO,
1182 "info: SCAN_RESP: tlv_buf_size = %d\n",
1183 tlv_buf_size);
5e6e3a92
BZ		 1184
1185 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1186
1187 tlv_type = le16_to_cpu(current_tlv->header.type);
1188 tlv_len = le16_to_cpu(current_tlv->header.len);
1189
1190 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
acebe8c1
ZL		 1191 mwifiex_dbg(adapter, ERROR,
1192 "SCAN_RESP: TLV buffer corrupt\n");
5e6e3a92
BZ		 1193 break;
1194 }
1195
1196 if (req_tlv_type == tlv_type) {
1197 switch (tlv_type) {
1198 case TLV_TYPE_TSFTIMESTAMP:
acebe8c1
ZL		 1199 mwifiex_dbg(adapter, INFO,
1200 "info: SCAN_RESP: TSF\t"
1201 "timestamp TLV, len = %d\n",
1202 tlv_len);
2c208890 1203 *tlv_data = current_tlv;
5e6e3a92
BZ		 1204 break;
1205 case TLV_TYPE_CHANNELBANDLIST:
acebe8c1
ZL		 1206 mwifiex_dbg(adapter, INFO,
1207 "info: SCAN_RESP: channel\t"
1208 "band list TLV, len = %d\n",
1209 tlv_len);
2c208890 1210 *tlv_data = current_tlv;
5e6e3a92
BZ		 1211 break;
1212 default:
acebe8c1
ZL		 1213 mwifiex_dbg(adapter, ERROR,
1214 "SCAN_RESP: unhandled TLV = %d\n",
1215 tlv_type);
5e6e3a92
BZ		 1216 /* Give up, this seems corrupted */
1217 return;
1218 }
1219 }
1220
1221 if (*tlv_data)
1222 break;
1223
1224
1225 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1226 current_tlv =
1227 (struct mwifiex_ie_types_data *) (current_tlv->data +
1228 tlv_len);
1229
1230 } /* while */
1231}
1232
1233/*
7c6fa2a8
AK		 1234 * This function parses provided beacon buffer and updates
1235 * respective fields in bss descriptor structure.
5e6e3a92 1236 */
9558a407
AK		 1237int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1238 struct mwifiex_bssdescriptor *bss_entry)
5e6e3a92
BZ		 1239{
1240 int ret = 0;
1241 u8 element_id;
1242 struct ieee_types_fh_param_set *fh_param_set;
1243 struct ieee_types_ds_param_set *ds_param_set;
1244 struct ieee_types_cf_param_set *cf_param_set;
1245 struct ieee_types_ibss_param_set *ibss_param_set;
5e6e3a92
BZ		 1246 u8 *current_ptr;
1247 u8 *rate;
1248 u8 element_len;
1249 u16 total_ie_len;
1250 u8 bytes_to_copy;
1251 u8 rate_size;
5e6e3a92 1252 u8 found_data_rate_ie;
7c6fa2a8 1253 u32 bytes_left;
5e6e3a92
BZ		 1254 struct ieee_types_vendor_specific *vendor_ie;
1255 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1256 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1257
1258 found_data_rate_ie = false;
1259 rate_size = 0;
9558a407
AK		 1260 current_ptr = bss_entry->beacon_buf;
1261 bytes_left = bss_entry->beacon_buf_size;
5e6e3a92
BZ		 1262
1263 /* Process variable IE */
7c6fa2a8 1264 while (bytes_left >= 2) {
5e6e3a92
BZ		 1265 element_id = *current_ptr;
1266 element_len = *(current_ptr + 1);
1267 total_ie_len = element_len + sizeof(struct ieee_types_header);
1268
7c6fa2a8 1269 if (bytes_left < total_ie_len) {
acebe8c1
ZL		 1270 mwifiex_dbg(adapter, ERROR,
1271 "err: InterpretIE: in processing\t"
1272 "IE, bytes left < IE length\n");
7c6fa2a8 1273 return -1;
5e6e3a92
BZ		 1274 }
1275 switch (element_id) {
1276 case WLAN_EID_SSID:
1277 bss_entry->ssid.ssid_len = element_len;
1278 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1279 element_len);
acebe8c1
ZL		 1280 mwifiex_dbg(adapter, INFO,
1281 "info: InterpretIE: ssid: %-32s\n",
1282 bss_entry->ssid.ssid);
5e6e3a92
BZ		 1283 break;
1284
1285 case WLAN_EID_SUPP_RATES:
1286 memcpy(bss_entry->data_rates, current_ptr + 2,
1287 element_len);
1288 memcpy(bss_entry->supported_rates, current_ptr + 2,
1289 element_len);
1290 rate_size = element_len;
1291 found_data_rate_ie = true;
1292 break;
1293
1294 case WLAN_EID_FH_PARAMS:
1295 fh_param_set =
1296 (struct ieee_types_fh_param_set *) current_ptr;
1297 memcpy(&bss_entry->phy_param_set.fh_param_set,
1298 fh_param_set,
1299 sizeof(struct ieee_types_fh_param_set));
1300 break;
1301
1302 case WLAN_EID_DS_PARAMS:
1303 ds_param_set =
1304 (struct ieee_types_ds_param_set *) current_ptr;
1305
1306 bss_entry->channel = ds_param_set->current_chan;
1307
1308 memcpy(&bss_entry->phy_param_set.ds_param_set,
1309 ds_param_set,
1310 sizeof(struct ieee_types_ds_param_set));
1311 break;
1312
1313 case WLAN_EID_CF_PARAMS:
1314 cf_param_set =
1315 (struct ieee_types_cf_param_set *) current_ptr;
1316 memcpy(&bss_entry->ss_param_set.cf_param_set,
1317 cf_param_set,
1318 sizeof(struct ieee_types_cf_param_set));
1319 break;
1320
1321 case WLAN_EID_IBSS_PARAMS:
1322 ibss_param_set =
1323 (struct ieee_types_ibss_param_set *)
1324 current_ptr;
1325 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1326 ibss_param_set,
1327 sizeof(struct ieee_types_ibss_param_set));
1328 break;
1329
1330 case WLAN_EID_ERP_INFO:
1331 bss_entry->erp_flags = *(current_ptr + 2);
1332 break;
1333
2a7305c8
AK		 1334 case WLAN_EID_PWR_CONSTRAINT:
1335 bss_entry->local_constraint = *(current_ptr + 2);
1336 bss_entry->sensed_11h = true;
1337 break;
1338
1339 case WLAN_EID_CHANNEL_SWITCH:
1340 bss_entry->chan_sw_ie_present = true;
1341 case WLAN_EID_PWR_CAPABILITY:
1342 case WLAN_EID_TPC_REPORT:
1343 case WLAN_EID_QUIET:
1344 bss_entry->sensed_11h = true;
1345 break;
1346
5e6e3a92
BZ		 1347 case WLAN_EID_EXT_SUPP_RATES:
1348 /*
1349 * Only process extended supported rate
1350 * if data rate is already found.
1351 * Data rate IE should come before
1352 * extended supported rate IE
1353 */
1354 if (found_data_rate_ie) {
1355 if ((element_len + rate_size) >
1356 MWIFIEX_SUPPORTED_RATES)
1357 bytes_to_copy =
1358 (MWIFIEX_SUPPORTED_RATES -
1359 rate_size);
1360 else
1361 bytes_to_copy = element_len;
1362
1363 rate = (u8 *) bss_entry->data_rates;
1364 rate += rate_size;
1365 memcpy(rate, current_ptr + 2, bytes_to_copy);
1366
1367 rate = (u8 *) bss_entry->supported_rates;
1368 rate += rate_size;
1369 memcpy(rate, current_ptr + 2, bytes_to_copy);
1370 }
1371 break;
1372
1373 case WLAN_EID_VENDOR_SPECIFIC:
1374 vendor_ie = (struct ieee_types_vendor_specific *)
1375 current_ptr;
1376
1377 if (!memcmp
1378 (vendor_ie->vend_hdr.oui, wpa_oui,
1379 sizeof(wpa_oui))) {
1380 bss_entry->bcn_wpa_ie =
1381 (struct ieee_types_vendor_specific *)
1382 current_ptr;
cff23cec
YAP		 1383 bss_entry->wpa_offset = (u16)
1384 (current_ptr - bss_entry->beacon_buf);
5e6e3a92
BZ		 1385 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1386 sizeof(wmm_oui))) {
1387 if (total_ie_len ==
cff23cec
YAP		 1388 sizeof(struct ieee_types_wmm_parameter) ||
1389 total_ie_len ==
5e6e3a92
BZ		 1390 sizeof(struct ieee_types_wmm_info))
1391 /*
1392 * Only accept and copy the WMM IE if
1393 * it matches the size expected for the
1394 * WMM Info IE or the WMM Parameter IE.
1395 */
1396 memcpy((u8 *) &bss_entry->wmm_ie,
1397 current_ptr, total_ie_len);
1398 }
1399 break;
1400 case WLAN_EID_RSN:
1401 bss_entry->bcn_rsn_ie =
1402 (struct ieee_types_generic *) current_ptr;
1403 bss_entry->rsn_offset = (u16) (current_ptr -
1404 bss_entry->beacon_buf);
1405 break;
1406 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1407 bss_entry->bcn_wapi_ie =
1408 (struct ieee_types_generic *) current_ptr;
1409 bss_entry->wapi_offset = (u16) (current_ptr -
1410 bss_entry->beacon_buf);
1411 break;
1412 case WLAN_EID_HT_CAPABILITY:
1413 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1414 (current_ptr +
1415 sizeof(struct ieee_types_header));
1416 bss_entry->ht_cap_offset = (u16) (current_ptr +
1417 sizeof(struct ieee_types_header) -
1418 bss_entry->beacon_buf);
1419 break;
074d46d1
JB		 1420 case WLAN_EID_HT_OPERATION:
1421 bss_entry->bcn_ht_oper =
1422 (struct ieee80211_ht_operation *)(current_ptr +
5e6e3a92
BZ		 1423 sizeof(struct ieee_types_header));
1424 bss_entry->ht_info_offset = (u16) (current_ptr +
1425 sizeof(struct ieee_types_header) -
1426 bss_entry->beacon_buf);
1427 break;
a5f39056
YAP		 1428 case WLAN_EID_VHT_CAPABILITY:
1429 bss_entry->disable_11ac = false;
1430 bss_entry->bcn_vht_cap =
1431 (void *)(current_ptr +
1432 sizeof(struct ieee_types_header));
1433 bss_entry->vht_cap_offset =
1434 (u16)((u8 *)bss_entry->bcn_vht_cap -
1435 bss_entry->beacon_buf);
1436 break;
1437 case WLAN_EID_VHT_OPERATION:
1438 bss_entry->bcn_vht_oper =
1439 (void *)(current_ptr +
1440 sizeof(struct ieee_types_header));
1441 bss_entry->vht_info_offset =
1442 (u16)((u8 *)bss_entry->bcn_vht_oper -
1443 bss_entry->beacon_buf);
1444 break;
5e6e3a92 1445 case WLAN_EID_BSS_COEX_2040:
cf831ffe
AK		 1446 bss_entry->bcn_bss_co_2040 = current_ptr;
1447 bss_entry->bss_co_2040_offset =
1448 (u16) (current_ptr - bss_entry->beacon_buf);
5e6e3a92
BZ		 1449 break;
1450 case WLAN_EID_EXT_CAPABILITY:
cf831ffe
AK		 1451 bss_entry->bcn_ext_cap = current_ptr;
1452 bss_entry->ext_cap_offset =
1453 (u16) (current_ptr - bss_entry->beacon_buf);
5e6e3a92 1454 break;
a5f39056 1455 case WLAN_EID_OPMODE_NOTIF:
cf831ffe 1456 bss_entry->oper_mode = (void *)current_ptr;
a5f39056
YAP		 1457 bss_entry->oper_mode_offset =
1458 (u16)((u8 *)bss_entry->oper_mode -
1459 bss_entry->beacon_buf);
1460 break;
5e6e3a92
BZ		 1461 default:
1462 break;
1463 }
1464
1465 current_ptr += element_len + 2;
1466
1467 /* Need to account for IE ID and IE Len */
7c6fa2a8 1468 bytes_left -= (element_len + 2);
5e6e3a92 1469
7c6fa2a8 1470 } /* while (bytes_left > 2) */
5e6e3a92
BZ		 1471 return ret;
1472}
1473
5e6e3a92
BZ		 1474/*
1475 * This function converts radio type scan parameter to a band configuration
1476 * to be used in join command.
1477 */
1478static u8
1479mwifiex_radio_type_to_band(u8 radio_type)
1480{
5e6e3a92
BZ		 1481 switch (radio_type) {
1482 case HostCmd_SCAN_RADIO_TYPE_A:
636c4598 1483 return BAND_A;
5e6e3a92
BZ		 1484 case HostCmd_SCAN_RADIO_TYPE_BG:
1485 default:
636c4598 1486 return BAND_G;
5e6e3a92 1487 }
5e6e3a92
BZ		 1488}
1489
5e6e3a92
BZ		 1490/*
1491 * This is an internal function used to start a scan based on an input
1492 * configuration.
1493 *
1494 * This uses the input user scan configuration information when provided in
1495 * order to send the appropriate scan commands to firmware to populate or
1496 * update the internal driver scan table.
1497 */
1a1fb970
AK		 1498int mwifiex_scan_networks(struct mwifiex_private *priv,
1499 const struct mwifiex_user_scan_cfg *user_scan_in)
5e6e3a92 1500{
c2476335 1501 int ret;
5e6e3a92 1502 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8
YAP		 1503 struct cmd_ctrl_node *cmd_node;
1504 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
5e6e3a92 1505 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
5e6e3a92 1506 struct mwifiex_chan_scan_param_set *scan_chan_list;
5e6e3a92
BZ		 1507 u8 filtered_scan;
1508 u8 scan_current_chan_only;
1509 u8 max_chan_per_scan;
1510 unsigned long flags;
1511
600f5d90 1512 if (adapter->scan_processing) {
acebe8c1
ZL		 1513 mwifiex_dbg(adapter, WARN,
1514 "cmd: Scan already in process...\n");
c2476335 1515 return -EBUSY;
5e6e3a92
BZ		 1516 }
1517
600f5d90 1518 if (priv->scan_block) {
acebe8c1
ZL		 1519 mwifiex_dbg(adapter, WARN,
1520 "cmd: Scan is blocked during association...\n");
c2476335 1521 return -EBUSY;
5e6e3a92
BZ		 1522 }
1523
e00483f7 1524 if (adapter->surprise_removed || adapter->is_cmd_timedout) {
acebe8c1
ZL		 1525 mwifiex_dbg(adapter, ERROR,
1526 "Ignore scan. Card removed or firmware in bad state\n");
e00483f7
AK		 1527 return -EFAULT;
1528 }
1529
c2476335
BZ		 1530 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1531 adapter->scan_processing = true;
1532 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1533
5e6e3a92 1534 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
0d2e7a5c 1535 GFP_KERNEL);
5e6e3a92 1536 if (!scan_cfg_out) {
061f2e69
AK		 1537 ret = -ENOMEM;
1538 goto done;
5e6e3a92
BZ		 1539 }
1540
0d2e7a5c
JP		 1541 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX,
1542 sizeof(struct mwifiex_chan_scan_param_set),
1543 GFP_KERNEL);
5e6e3a92 1544 if (!scan_chan_list) {
5e6e3a92 1545 kfree(scan_cfg_out);
061f2e69
AK		 1546 ret = -ENOMEM;
1547 goto done;
5e6e3a92
BZ		 1548 }
1549
cff23cec
YAP		 1550 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1551 &chan_list_out, scan_chan_list, &max_chan_per_scan,
1552 &filtered_scan, &scan_current_chan_only);
5e6e3a92 1553
600f5d90
AK		 1554 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1555 &scan_cfg_out->config, chan_list_out,
1556 scan_chan_list);
5e6e3a92
BZ		 1557
1558 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1559 if (!ret) {
1560 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1561 if (!list_empty(&adapter->scan_pending_q)) {
1562 cmd_node = list_first_entry(&adapter->scan_pending_q,
cff23cec 1563 struct cmd_ctrl_node, list);
5e6e3a92
BZ		 1564 list_del(&cmd_node->list);
1565 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
cff23cec 1566 flags);
5e6e3a92
BZ		 1567 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1568 true);
1a1fb970 1569 queue_work(adapter->workqueue, &adapter->main_work);
00d7ea11
AK		 1570
1571 /* Perform internal scan synchronously */
21de979e 1572 if (!priv->scan_request) {
acebe8c1
ZL		 1573 mwifiex_dbg(adapter, INFO,
1574 "wait internal scan\n");
00d7ea11 1575 mwifiex_wait_queue_complete(adapter, cmd_node);
21de979e 1576 }
5e6e3a92
BZ		 1577 } else {
1578 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1579 flags);
1580 }
5e6e3a92
BZ		 1581 }
1582
1583 kfree(scan_cfg_out);
1584 kfree(scan_chan_list);
061f2e69
AK		 1585done:
1586 if (ret) {
1587 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1588 adapter->scan_processing = false;
1589 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1590 }
5e6e3a92
BZ		 1591 return ret;
1592}
1593
1594/*
1595 * This function prepares a scan command to be sent to the firmware.
1596 *
1597 * This uses the scan command configuration sent to the command processing
1598 * module in command preparation stage to configure a scan command structure
1599 * to send to firmware.
1600 *
1601 * The fixed fields specifying the BSS type and BSSID filters as well as a
1602 * variable number/length of TLVs are sent in the command to firmware.
1603 *
1604 * Preparation also includes -
1605 * - Setting command ID, and proper size
1606 * - Ensuring correct endian-ness
1607 */
a5ffddb7
AK		 1608int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1609 struct mwifiex_scan_cmd_config *scan_cfg)
5e6e3a92
BZ		 1610{
1611 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
5e6e3a92
BZ		 1612
1613 /* Set fixed field variables in scan command */
1614 scan_cmd->bss_mode = scan_cfg->bss_mode;
1615 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1616 sizeof(scan_cmd->bssid));
1617 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1618
1619 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1620
1621 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1622 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1623 + sizeof(scan_cmd->bssid)
1624 + scan_cfg->tlv_buf_len + S_DS_GEN));
1625
1626 return 0;
1627}
1628
7c6fa2a8
AK		 1629/*
1630 * This function checks compatibility of requested network with current
1631 * driver settings.
1632 */
1633int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1634 struct mwifiex_bssdescriptor *bss_desc)
1635{
1636 int ret = -1;
1637
1638 if (!bss_desc)
1639 return -1;
1640
6685d109
YAP		 1641 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1642 (u16) bss_desc->channel, 0))) {
7c6fa2a8
AK		 1643 switch (priv->bss_mode) {
1644 case NL80211_IFTYPE_STATION:
1645 case NL80211_IFTYPE_ADHOC:
1646 ret = mwifiex_is_network_compatible(priv, bss_desc,
1647 priv->bss_mode);
1648 if (ret)
acebe8c1
ZL		 1649 mwifiex_dbg(priv->adapter, ERROR,
1650 "Incompatible network settings\n");
2f9279b5 1651 break;
7c6fa2a8 1652 default:
2f9279b5 1653 ret = 0;
7c6fa2a8
AK		 1654 }
1655 }
1656
1657 return ret;
1658}
1659
2375fa2b 1660/* This function checks if SSID string contains all zeroes or length is zero */
1661static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid)
1662{
1663 int idx;
1664
1665 for (idx = 0; idx < ssid->ssid_len; idx++) {
1666 if (ssid->ssid[idx])
1667 return false;
1668 }
1669
1670 return true;
1671}
1672
1673/* This function checks if any hidden SSID found in passive scan channels
1674 * and save those channels for specific SSID active scan
1675 */
1676static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv,
1677 struct cfg80211_bss *bss)
1678{
1679 struct mwifiex_bssdescriptor *bss_desc;
1680 int ret;
1681 int chid;
1682
1683 /* Allocate and fill new bss descriptor */
1684 bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL);
1685 if (!bss_desc)
1686 return -ENOMEM;
1687
1688 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1689 if (ret)
1690 goto done;
1691
1692 if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) {
1693 mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n");
1694 for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) {
1695 if (priv->hidden_chan[chid].chan_number ==
1696 bss->channel->hw_value)
1697 break;
1698
1699 if (!priv->hidden_chan[chid].chan_number) {
1700 priv->hidden_chan[chid].chan_number =
1701 bss->channel->hw_value;
1702 priv->hidden_chan[chid].radio_type =
1703 bss->channel->band;
1704 priv->hidden_chan[chid].scan_type =
1705 MWIFIEX_SCAN_TYPE_ACTIVE;
1706 break;
1707 }
1708 }
1709 }
1710
1711done:
1712 kfree(bss_desc);
1713 return 0;
1714}
1715
9558a407
AK		 1716static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1717 struct cfg80211_bss *bss)
7c6fa2a8 1718{
db652e4b 1719 struct mwifiex_bssdescriptor *bss_desc;
7c6fa2a8
AK		 1720 int ret;
1721 unsigned long flags;
7c6fa2a8
AK		 1722
1723 /* Allocate and fill new bss descriptor */
0d2e7a5c
JP		 1724 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL);
1725 if (!bss_desc)
7c6fa2a8 1726 return -ENOMEM;
5982b47a 1727
9558a407 1728 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
7c6fa2a8
AK		 1729 if (ret)
1730 goto done;
1731
1732 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1733 if (ret)
1734 goto done;
1735
7c6fa2a8 1736 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
7c6fa2a8
AK		 1737 /* Make a copy of current BSSID descriptor */
1738 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
cff23cec 1739 sizeof(priv->curr_bss_params.bss_descriptor));
d837a2ae
BZ		 1740
1741 /* The contents of beacon_ie will be copied to its own buffer
1742 * in mwifiex_save_curr_bcn()
1743 */
7c6fa2a8
AK		 1744 mwifiex_save_curr_bcn(priv);
1745 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1746
1747done:
d837a2ae
BZ		 1748 /* beacon_ie buffer was allocated in function
1749 * mwifiex_fill_new_bss_desc(). Free it now.
1750 */
1751 kfree(bss_desc->beacon_buf);
7c6fa2a8 1752 kfree(bss_desc);
7c6fa2a8
AK		 1753 return 0;
1754}
1755
3b4d5c64
AK		 1756static int
1757mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
1758 u32 *bytes_left, u64 fw_tsf, u8 *radio_type,
21f58d20 1759 bool ext_scan, s32 rssi_val)
3b4d5c64
AK		 1760{
1761 struct mwifiex_adapter *adapter = priv->adapter;
1762 struct mwifiex_chan_freq_power *cfp;
1763 struct cfg80211_bss *bss;
1764 u8 bssid[ETH_ALEN];
1765 s32 rssi;
1766 const u8 *ie_buf;
1767 size_t ie_len;
1768 u16 channel = 0;
1769 u16 beacon_size = 0;
1770 u32 curr_bcn_bytes;
1771 u32 freq;
1772 u16 beacon_period;
1773 u16 cap_info_bitmap;
1774 u8 *current_ptr;
1775 u64 timestamp;
1776 struct mwifiex_fixed_bcn_param *bcn_param;
1777 struct mwifiex_bss_priv *bss_priv;
1778
1779 if (*bytes_left >= sizeof(beacon_size)) {
1780 /* Extract & convert beacon size from command buffer */
798ea8ee 1781 beacon_size = le16_to_cpu(*(__le16 *)(*bss_info));
3b4d5c64
AK		 1782 *bytes_left -= sizeof(beacon_size);
1783 *bss_info += sizeof(beacon_size);
1784 }
1785
1786 if (!beacon_size || beacon_size > *bytes_left) {
1787 *bss_info += *bytes_left;
1788 *bytes_left = 0;
1789 return -EFAULT;
1790 }
1791
1792 /* Initialize the current working beacon pointer for this BSS
1793 * iteration
1794 */
1795 current_ptr = *bss_info;
1796
1797 /* Advance the return beacon pointer past the current beacon */
1798 *bss_info += beacon_size;
1799 *bytes_left -= beacon_size;
1800
1801 curr_bcn_bytes = beacon_size;
1802
1803 /* First 5 fields are bssid, RSSI(for legacy scan only),
1804 * time stamp, beacon interval, and capability information
1805 */
1806 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
1807 sizeof(struct mwifiex_fixed_bcn_param)) {
acebe8c1
ZL		 1808 mwifiex_dbg(adapter, ERROR,
1809 "InterpretIE: not enough bytes left\n");
3b4d5c64
AK		 1810 return -EFAULT;
1811 }
1812
1813 memcpy(bssid, current_ptr, ETH_ALEN);
1814 current_ptr += ETH_ALEN;
1815 curr_bcn_bytes -= ETH_ALEN;
1816
1817 if (!ext_scan) {
45d18c56 1818 rssi = (s32) *current_ptr;
3b4d5c64
AK		 1819 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1820 current_ptr += sizeof(u8);
1821 curr_bcn_bytes -= sizeof(u8);
acebe8c1
ZL		 1822 mwifiex_dbg(adapter, INFO,
1823 "info: InterpretIE: RSSI=%d\n", rssi);
21f58d20
AK		 1824 } else {
1825 rssi = rssi_val;
3b4d5c64
AK		 1826 }
1827
1828 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr;
1829 current_ptr += sizeof(*bcn_param);
1830 curr_bcn_bytes -= sizeof(*bcn_param);
1831
1832 timestamp = le64_to_cpu(bcn_param->timestamp);
1833 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1834
1835 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
acebe8c1
ZL		 1836 mwifiex_dbg(adapter, INFO,
1837 "info: InterpretIE: capabilities=0x%X\n",
1838 cap_info_bitmap);
3b4d5c64
AK		 1839
1840 /* Rest of the current buffer are IE's */
1841 ie_buf = current_ptr;
1842 ie_len = curr_bcn_bytes;
acebe8c1
ZL		 1843 mwifiex_dbg(adapter, INFO,
1844 "info: InterpretIE: IELength for this AP = %d\n",
1845 curr_bcn_bytes);
3b4d5c64
AK		 1846
1847 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1848 u8 element_id, element_len;
1849
1850 element_id = *current_ptr;
1851 element_len = *(current_ptr + 1);
1852 if (curr_bcn_bytes < element_len +
1853 sizeof(struct ieee_types_header)) {
acebe8c1
ZL		 1854 mwifiex_dbg(adapter, ERROR,
1855 "%s: bytes left < IE length\n", __func__);
3b4d5c64
AK		 1856 return -EFAULT;
1857 }
1858 if (element_id == WLAN_EID_DS_PARAMS) {
1859 channel = *(current_ptr +
1860 sizeof(struct ieee_types_header));
1861 break;
1862 }
1863
1864 current_ptr += element_len + sizeof(struct ieee_types_header);
1865 curr_bcn_bytes -= element_len +
1866 sizeof(struct ieee_types_header);
1867 }
1868
1869 if (channel) {
1870 struct ieee80211_channel *chan;
1871 u8 band;
1872
1873 /* Skip entry if on csa closed channel */
1874 if (channel == priv->csa_chan) {
acebe8c1
ZL		 1875 mwifiex_dbg(adapter, WARN,
1876 "Dropping entry on csa closed channel\n");
3b4d5c64
AK		 1877 return 0;
1878 }
1879
1880 band = BAND_G;
1881 if (radio_type)
1882 band = mwifiex_radio_type_to_band(*radio_type &
1883 (BIT(0) | BIT(1)));
1884
1885 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1886
1887 freq = cfp ? cfp->freq : 0;
1888
4facc34a 1889 chan = ieee80211_get_channel(priv->wdev.wiphy, freq);
3b4d5c64
AK		 1890
1891 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
4facc34a 1892 bss = cfg80211_inform_bss(priv->wdev.wiphy,
5bc8c1f2
JB		 1893 chan, CFG80211_BSS_FTYPE_UNKNOWN,
1894 bssid, timestamp,
3b4d5c64
AK		 1895 cap_info_bitmap, beacon_period,
1896 ie_buf, ie_len, rssi, GFP_KERNEL);
02421dd3
XH		 1897 if (bss) {
1898 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1899 bss_priv->band = band;
1900 bss_priv->fw_tsf = fw_tsf;
1901 if (priv->media_connected &&
1902 !memcmp(bssid, priv->curr_bss_params.
1903 bss_descriptor.mac_address,
1904 ETH_ALEN))
1905 mwifiex_update_curr_bss_params(priv,
1906 bss);
1907 cfg80211_put_bss(priv->wdev.wiphy, bss);
1908 }
2375fa2b 1909
1910 if ((chan->flags & IEEE80211_CHAN_RADAR) ||
1911 (chan->flags & IEEE80211_CHAN_NO_IR)) {
1912 mwifiex_dbg(adapter, INFO,
1913 "radar or passive channel %d\n",
1914 channel);
1915 mwifiex_save_hidden_ssid_channels(priv, bss);
1916 }
3b4d5c64
AK		 1917 }
1918 } else {
acebe8c1 1919 mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n");
3b4d5c64
AK		 1920 }
1921
1922 return 0;
1923}
1924
21445049
AP		 1925static void mwifiex_complete_scan(struct mwifiex_private *priv)
1926{
1927 struct mwifiex_adapter *adapter = priv->adapter;
1928
bf354433 1929 adapter->survey_idx = 0;
21445049
AP		 1930 if (adapter->curr_cmd->wait_q_enabled) {
1931 adapter->cmd_wait_q.status = 0;
1932 if (!priv->scan_request) {
acebe8c1
ZL		 1933 mwifiex_dbg(adapter, INFO,
1934 "complete internal scan\n");
21445049
AP		 1935 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1936 }
1937 }
1938}
1939
2375fa2b 1940/* This function checks if any hidden SSID found in passive scan channels
1941 * and do specific SSID active scan for those channels
1942 */
1943static int
1944mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv)
1945{
1946 int ret;
1947 struct mwifiex_adapter *adapter = priv->adapter;
1948 u8 id = 0;
1949 struct mwifiex_user_scan_cfg *user_scan_cfg;
1950
17e524b1 1951 if (adapter->active_scan_triggered || !priv->scan_request) {
2375fa2b 1952 adapter->active_scan_triggered = false;
1953 return 0;
1954 }
1955
1956 if (!priv->hidden_chan[0].chan_number) {
1957 mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n");
1958 return 0;
1959 }
1960 user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL);
1961
1962 if (!user_scan_cfg)
1963 return -ENOMEM;
1964
1965 memset(user_scan_cfg, 0, sizeof(*user_scan_cfg));
1966
1967 for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) {
1968 if (!priv->hidden_chan[id].chan_number)
1969 break;
1970 memcpy(&user_scan_cfg->chan_list[id],
1971 &priv->hidden_chan[id],
1972 sizeof(struct mwifiex_user_scan_chan));
1973 }
1974
1975 adapter->active_scan_triggered = true;
1976 user_scan_cfg->num_ssids = priv->scan_request->n_ssids;
1977 user_scan_cfg->ssid_list = priv->scan_request->ssids;
1978
1979 ret = mwifiex_scan_networks(priv, user_scan_cfg);
1980 kfree(user_scan_cfg);
1981
1982 memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan));
1983
1984 if (ret) {
1985 dev_err(priv->adapter->dev, "scan failed: %d\n", ret);
1986 return ret;
1987 }
1988
1989 return 0;
1990}
d44b5c2f
AK		 1991static void mwifiex_check_next_scan_command(struct mwifiex_private *priv)
1992{
1993 struct mwifiex_adapter *adapter = priv->adapter;
d8d91253 1994 struct cmd_ctrl_node *cmd_node, *tmp_node;
d44b5c2f
AK		 1995 unsigned long flags;
1996
1997 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1998 if (list_empty(&adapter->scan_pending_q)) {
1999 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2000 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
2001 adapter->scan_processing = false;
2002 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
2003
2375fa2b 2004 mwifiex_active_scan_req_for_passive_chan(priv);
2005
21445049
AP		 2006 if (!adapter->ext_scan)
2007 mwifiex_complete_scan(priv);
2008
d44b5c2f 2009 if (priv->scan_request) {
acebe8c1
ZL		 2010 mwifiex_dbg(adapter, INFO,
2011 "info: notifying scan done\n");
d44b5c2f
AK		 2012 cfg80211_scan_done(priv->scan_request, 0);
2013 priv->scan_request = NULL;
2014 } else {
2015 priv->scan_aborting = false;
acebe8c1
ZL		 2016 mwifiex_dbg(adapter, INFO,
2017 "info: scan already aborted\n");
d44b5c2f 2018 }
d8d91253
AK		 2019 } else if ((priv->scan_aborting && !priv->scan_request) ||
2020 priv->scan_block) {
2021 list_for_each_entry_safe(cmd_node, tmp_node,
2022 &adapter->scan_pending_q, list) {
d44b5c2f 2023 list_del(&cmd_node->list);
d8d91253
AK		 2024 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
2025 }
2026 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2027
2028 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
2029 adapter->scan_processing = false;
2030 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
2031
2375fa2b 2032 if (!adapter->active_scan_triggered) {
2033 if (priv->scan_request) {
2034 mwifiex_dbg(adapter, INFO,
2035 "info: aborting scan\n");
2036 cfg80211_scan_done(priv->scan_request, 1);
2037 priv->scan_request = NULL;
2038 } else {
2039 priv->scan_aborting = false;
2040 mwifiex_dbg(adapter, INFO,
2041 "info: scan already aborted\n");
2042 }
d44b5c2f 2043 }
d8d91253
AK		 2044 } else {
2045 /* Get scan command from scan_pending_q and put to
2046 * cmd_pending_q
2047 */
2048 cmd_node = list_first_entry(&adapter->scan_pending_q,
2049 struct cmd_ctrl_node, list);
2050 list_del(&cmd_node->list);
2051 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2052 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
d44b5c2f
AK		 2053 }
2054
2055 return;
2056}
2057
5e6e3a92
BZ		 2058/*
2059 * This function handles the command response of scan.
2060 *
2061 * The response buffer for the scan command has the following
2062 * memory layout:
2063 *
2064 * .-------------------------------------------------------------.
2065 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
2066 * .-------------------------------------------------------------.
2067 * | BufSize (t_u16) : sizeof the BSS Description data |
2068 * .-------------------------------------------------------------.
2069 * | NumOfSet (t_u8) : Number of BSS Descs returned |
2070 * .-------------------------------------------------------------.
2071 * | BSSDescription data (variable, size given in BufSize) |
2072 * .-------------------------------------------------------------.
2073 * | TLV data (variable, size calculated using Header->Size, |
2074 * | BufSize and sizeof the fixed fields above) |
2075 * .-------------------------------------------------------------.
2076 */
2077int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
600f5d90 2078 struct host_cmd_ds_command *resp)
5e6e3a92
BZ		 2079{
2080 int ret = 0;
2081 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8 2082 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
5e6e3a92
BZ		 2083 struct mwifiex_ie_types_data *tlv_data;
2084 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
2085 u8 *bss_info;
2086 u32 scan_resp_size;
2087 u32 bytes_left;
5e6e3a92
BZ		 2088 u32 idx;
2089 u32 tlv_buf_size;
5e6e3a92
BZ		 2090 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
2091 struct chan_band_param_set *chan_band;
5e6e3a92 2092 u8 is_bgscan_resp;
3b4d5c64
AK		 2093 __le64 fw_tsf = 0;
2094 u8 *radio_type;
7d7f07d8 2095 struct cfg80211_wowlan_nd_match *pmatch;
2096 struct cfg80211_sched_scan_request *nd_config = NULL;
5e6e3a92
BZ		 2097
2098 is_bgscan_resp = (le16_to_cpu(resp->command)
cff23cec 2099 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
5e6e3a92
BZ		 2100 if (is_bgscan_resp)
2101 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
2102 else
2103 scan_rsp = &resp->params.scan_resp;
2104
2105
67a50035 2106 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
acebe8c1
ZL		 2107 mwifiex_dbg(adapter, ERROR,
2108 "SCAN_RESP: too many AP returned (%d)\n",
2109 scan_rsp->number_of_sets);
5e6e3a92 2110 ret = -1;
8a7d7cbf 2111 goto check_next_scan;
5e6e3a92
BZ		 2112 }
2113
b887664d
AK		 2114 /* Check csa channel expiry before parsing scan response */
2115 mwifiex_11h_get_csa_closed_channel(priv);
2116
5e6e3a92 2117 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
acebe8c1
ZL		 2118 mwifiex_dbg(adapter, INFO,
2119 "info: SCAN_RESP: bss_descript_size %d\n",
2120 bytes_left);
5e6e3a92
BZ		 2121
2122 scan_resp_size = le16_to_cpu(resp->size);
2123
acebe8c1
ZL		 2124 mwifiex_dbg(adapter, INFO,
2125 "info: SCAN_RESP: returned %d APs before parsing\n",
2126 scan_rsp->number_of_sets);
5e6e3a92 2127
5e6e3a92
BZ		 2128 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
2129
2130 /*
2131 * The size of the TLV buffer is equal to the entire command response
2132 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
2133 * BSS Descriptions (bss_descript_size as bytesLef) and the command
2134 * response header (S_DS_GEN)
2135 */
2136 tlv_buf_size = scan_resp_size - (bytes_left
2137 + sizeof(scan_rsp->bss_descript_size)
2138 + sizeof(scan_rsp->number_of_sets)
2139 + S_DS_GEN);
2140
2141 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
2142 bss_desc_and_tlv_buffer +
2143 bytes_left);
2144
2145 /* Search the TLV buffer space in the scan response for any valid
2146 TLVs */
2147 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
2148 TLV_TYPE_TSFTIMESTAMP,
2149 (struct mwifiex_ie_types_data **)
2150 &tsf_tlv);
2151
2152 /* Search the TLV buffer space in the scan response for any valid
2153 TLVs */
2154 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
2155 TLV_TYPE_CHANNELBANDLIST,
2156 (struct mwifiex_ie_types_data **)
2157 &chan_band_tlv);
2158
7d7f07d8 2159#ifdef CONFIG_PM
2160 if (priv->wdev.wiphy->wowlan_config)
2161 nd_config = priv->wdev.wiphy->wowlan_config->nd_config;
2162#endif
2163
2164 if (nd_config) {
2165 adapter->nd_info =
2166 kzalloc(sizeof(struct cfg80211_wowlan_nd_match) +
2167 sizeof(struct cfg80211_wowlan_nd_match *) *
2168 scan_rsp->number_of_sets, GFP_ATOMIC);
2169
2170 if (adapter->nd_info)
2171 adapter->nd_info->n_matches = scan_rsp->number_of_sets;
2172 }
2173
5e6e3a92 2174 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
5e6e3a92
BZ		 2175 /*
2176 * If the TSF TLV was appended to the scan results, save this
b5abcf02
AK		 2177 * entry's TSF value in the fw_tsf field. It is the firmware's
2178 * TSF value at the time the beacon or probe response was
2179 * received.
5e6e3a92 2180 */
7c6fa2a8 2181 if (tsf_tlv)
b5abcf02
AK		 2182 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
2183 sizeof(fw_tsf));
7c6fa2a8 2184
3b4d5c64
AK		 2185 if (chan_band_tlv) {
2186 chan_band = &chan_band_tlv->chan_band_param[idx];
2187 radio_type = &chan_band->radio_type;
7c6fa2a8 2188 } else {
3b4d5c64 2189 radio_type = NULL;
7c6fa2a8 2190 }
3b4d5c64 2191
7d7f07d8 2192 if (chan_band_tlv && adapter->nd_info) {
2193 adapter->nd_info->matches[idx] =
2194 kzalloc(sizeof(*pmatch) +
2195 sizeof(u32), GFP_ATOMIC);
2196
2197 pmatch = adapter->nd_info->matches[idx];
2198
efdf0e39 2199 if (pmatch) {
7d7f07d8 2200 memset(pmatch, 0, sizeof(*pmatch));
2201 if (chan_band_tlv) {
2202 pmatch->n_channels = 1;
2203 pmatch->channels[0] =
2204 chan_band->chan_number;
2205 }
2206 }
2207 }
2208
3b4d5c64
AK		 2209 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
2210 &bytes_left,
2211 le64_to_cpu(fw_tsf),
21f58d20 2212 radio_type, false, 0);
3b4d5c64
AK		 2213 if (ret)
2214 goto check_next_scan;
7c6fa2a8 2215 }
5e6e3a92 2216
8a7d7cbf 2217check_next_scan:
d44b5c2f 2218 mwifiex_check_next_scan_command(priv);
5e6e3a92
BZ		 2219 return ret;
2220}
2221
21f58d20
AK		 2222/*
2223 * This function prepares an extended scan command to be sent to the firmware
2224 *
2225 * This uses the scan command configuration sent to the command processing
2226 * module in command preparation stage to configure a extended scan command
2227 * structure to send to firmware.
2228 */
2229int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv,
2230 struct host_cmd_ds_command *cmd,
2231 void *data_buf)
2232{
2233 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan;
2234 struct mwifiex_scan_cmd_config *scan_cfg = data_buf;
2235
2236 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
2237
2238 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT);
2239
2240 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
2241 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved)
2242 + scan_cfg->tlv_buf_len + S_DS_GEN));
2243
2244 return 0;
2245}
2246
0c9b7f22
XH		 2247/* This function prepares an background scan config command to be sent
2248 * to the firmware
2249 */
2250int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv,
2251 struct host_cmd_ds_command *cmd,
2252 void *data_buf)
2253{
2254 struct host_cmd_ds_802_11_bg_scan_config *bgscan_config =
2255 &cmd->params.bg_scan_config;
2256 struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf;
2257 u8 *tlv_pos = bgscan_config->tlv;
2258 u8 num_probes;
2259 u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num;
2260 int i;
2261 struct mwifiex_ie_types_num_probes *num_probes_tlv;
2262 struct mwifiex_ie_types_repeat_count *repeat_count_tlv;
fdcab083 2263 struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv;
0c9b7f22
XH		 2264 struct mwifiex_ie_types_bgscan_start_later *start_later_tlv;
2265 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
2266 struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv;
2267 struct mwifiex_chan_scan_param_set *temp_chan;
2268
2269 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG);
2270 cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN);
2271
2272 bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action);
2273 bgscan_config->enable = bgscan_cfg_in->enable;
2274 bgscan_config->bss_type = bgscan_cfg_in->bss_type;
2275 bgscan_config->scan_interval =
2276 cpu_to_le32(bgscan_cfg_in->scan_interval);
2277 bgscan_config->report_condition =
2278 cpu_to_le32(bgscan_cfg_in->report_condition);
2279
2280 /* stop sched scan */
2281 if (!bgscan_config->enable)
2282 return 0;
2283
2284 bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan;
2285
2286 num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in->
2287 num_probes : priv->adapter->scan_probes);
2288
2289 if (num_probes) {
2290 num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos;
2291 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
2292 num_probes_tlv->header.len =
2293 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
2294 num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes);
2295
2296 tlv_pos += sizeof(num_probes_tlv->header) +
2297 le16_to_cpu(num_probes_tlv->header.len);
2298 }
2299
2300 if (bgscan_cfg_in->repeat_count) {
2301 repeat_count_tlv =
2302 (struct mwifiex_ie_types_repeat_count *)tlv_pos;
2303 repeat_count_tlv->header.type =
2304 cpu_to_le16(TLV_TYPE_REPEAT_COUNT);
2305 repeat_count_tlv->header.len =
2306 cpu_to_le16(sizeof(repeat_count_tlv->repeat_count));
2307 repeat_count_tlv->repeat_count =
2308 cpu_to_le16(bgscan_cfg_in->repeat_count);
2309
2310 tlv_pos += sizeof(repeat_count_tlv->header) +
2311 le16_to_cpu(repeat_count_tlv->header.len);
2312 }
2313
fdcab083
GB		 2314 if (bgscan_cfg_in->rssi_threshold) {
2315 rssi_threshold_tlv =
2316 (struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos;
2317 rssi_threshold_tlv->header.type =
2318 cpu_to_le16(TLV_TYPE_RSSI_LOW);
2319 rssi_threshold_tlv->header.len =
2320 cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold));
2321 rssi_threshold_tlv->rssi_threshold =
2322 cpu_to_le16(bgscan_cfg_in->rssi_threshold);
2323
2324 tlv_pos += sizeof(rssi_threshold_tlv->header) +
2325 le16_to_cpu(rssi_threshold_tlv->header.len);
2326 }
2327
0c9b7f22
XH		 2328 for (i = 0; i < bgscan_cfg_in->num_ssids; i++) {
2329 ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len;
2330
2331 wildcard_ssid_tlv =
2332 (struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos;
2333 wildcard_ssid_tlv->header.type =
2334 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
2335 wildcard_ssid_tlv->header.len = cpu_to_le16(
2336 (u16)(ssid_len + sizeof(wildcard_ssid_tlv->
2337 max_ssid_length)));
2338
2339 /* max_ssid_length = 0 tells firmware to perform
2340 * specific scan for the SSID filled, whereas
2341 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
2342 * wildcard scan.
2343 */
2344 if (ssid_len)
2345 wildcard_ssid_tlv->max_ssid_length = 0;
2346 else
2347 wildcard_ssid_tlv->max_ssid_length =
2348 IEEE80211_MAX_SSID_LEN;
2349
2350 memcpy(wildcard_ssid_tlv->ssid,
2351 bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len);
2352
2353 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
2354 + le16_to_cpu(wildcard_ssid_tlv->header.len));
2355 }
2356
2357 chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos;
2358
2359 if (bgscan_cfg_in->chan_list[0].chan_number) {
2360 dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n");
2361
2362 chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
2363
2364 for (chan_idx = 0;
2365 chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX &&
2366 bgscan_cfg_in->chan_list[chan_idx].chan_number;
2367 chan_idx++) {
2368 temp_chan = chan_list_tlv->chan_scan_param + chan_idx;
2369
2370 /* Increment the TLV header length by size appended */
2371 le16_add_cpu(&chan_list_tlv->header.len,
2372 sizeof(chan_list_tlv->chan_scan_param));
2373
2374 temp_chan->chan_number =
2375 bgscan_cfg_in->chan_list[chan_idx].chan_number;
2376 temp_chan->radio_type =
2377 bgscan_cfg_in->chan_list[chan_idx].radio_type;
2378
2379 scan_type =
2380 bgscan_cfg_in->chan_list[chan_idx].scan_type;
2381
2382 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
2383 temp_chan->chan_scan_mode_bitmap
2384 |= MWIFIEX_PASSIVE_SCAN;
2385 else
2386 temp_chan->chan_scan_mode_bitmap
2387 &= ~MWIFIEX_PASSIVE_SCAN;
2388
2389 if (bgscan_cfg_in->chan_list[chan_idx].scan_time) {
2390 scan_dur = (u16)bgscan_cfg_in->
2391 chan_list[chan_idx].scan_time;
2392 } else {
2393 scan_dur = (scan_type ==
2394 MWIFIEX_SCAN_TYPE_PASSIVE) ?
2395 priv->adapter->passive_scan_time :
2396 priv->adapter->specific_scan_time;
2397 }
2398
2399 temp_chan->min_scan_time = cpu_to_le16(scan_dur);
2400 temp_chan->max_scan_time = cpu_to_le16(scan_dur);
2401 }
2402 } else {
2403 dev_dbg(priv->adapter->dev,
2404 "info: bgscan: Creating full region channel list\n");
2405 chan_num =
2406 mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in,
2407 chan_list_tlv->
2408 chan_scan_param);
2409 le16_add_cpu(&chan_list_tlv->header.len,
2410 chan_num *
2411 sizeof(chan_list_tlv->chan_scan_param[0]));
2412 }
2413
2414 tlv_pos += (sizeof(chan_list_tlv->header)
2415 + le16_to_cpu(chan_list_tlv->header.len));
2416
2417 if (bgscan_cfg_in->start_later) {
2418 start_later_tlv =
2419 (struct mwifiex_ie_types_bgscan_start_later *)tlv_pos;
2420 start_later_tlv->header.type =
2421 cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER);
2422 start_later_tlv->header.len =
2423 cpu_to_le16(sizeof(start_later_tlv->start_later));
2424 start_later_tlv->start_later =
2425 cpu_to_le16(bgscan_cfg_in->start_later);
2426
2427 tlv_pos += sizeof(start_later_tlv->header) +
2428 le16_to_cpu(start_later_tlv->header.len);
2429 }
2430
2431 /* Append vendor specific IE TLV */
2432 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos);
2433
2434 le16_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv);
2435
2436 return 0;
2437}
2438
2439int mwifiex_stop_bg_scan(struct mwifiex_private *priv)
2440{
2441 struct mwifiex_bg_scan_cfg *bgscan_cfg;
2442
2443 if (!priv->sched_scanning) {
2444 dev_dbg(priv->adapter->dev, "bgscan already stopped!\n");
2445 return 0;
2446 }
2447
2448 bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL);
2449 if (!bgscan_cfg)
2450 return -ENOMEM;
2451
2452 bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA;
2453 bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET;
2454 bgscan_cfg->enable = false;
2455
2456 if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG,
2457 HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) {
2458 kfree(bgscan_cfg);
2459 return -EFAULT;
2460 }
2461
2462 kfree(bgscan_cfg);
2463 priv->sched_scanning = false;
2464
2465 return 0;
2466}
2467
bf354433
AP		 2468static void
2469mwifiex_update_chan_statistics(struct mwifiex_private *priv,
2470 struct mwifiex_ietypes_chanstats *tlv_stat)
2471{
2472 struct mwifiex_adapter *adapter = priv->adapter;
2473 u8 i, num_chan;
2474 struct mwifiex_fw_chan_stats *fw_chan_stats;
2475 struct mwifiex_chan_stats chan_stats;
2476
2477 fw_chan_stats = (void *)((u8 *)tlv_stat +
2478 sizeof(struct mwifiex_ie_types_header));
2479 num_chan = le16_to_cpu(tlv_stat->header.len) /
2480 sizeof(struct mwifiex_chan_stats);
2481
2482 for (i = 0 ; i < num_chan; i++) {
2483 chan_stats.chan_num = fw_chan_stats->chan_num;
2484 chan_stats.bandcfg = fw_chan_stats->bandcfg;
2485 chan_stats.flags = fw_chan_stats->flags;
2486 chan_stats.noise = fw_chan_stats->noise;
2487 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss);
2488 chan_stats.cca_scan_dur =
2489 le16_to_cpu(fw_chan_stats->cca_scan_dur);
2490 chan_stats.cca_busy_dur =
2491 le16_to_cpu(fw_chan_stats->cca_busy_dur);
acebe8c1
ZL		 2492 mwifiex_dbg(adapter, INFO,
2493 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n",
2494 chan_stats.chan_num,
2495 chan_stats.noise,
2496 chan_stats.total_bss,
2497 chan_stats.cca_scan_dur,
2498 chan_stats.cca_busy_dur);
bf354433
AP		 2499 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats,
2500 sizeof(struct mwifiex_chan_stats));
2501 fw_chan_stats++;
2502 }
2503}
2504
21f58d20 2505/* This function handles the command response of extended scan */
bf354433
AP		 2506int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv,
2507 struct host_cmd_ds_command *resp)
21f58d20 2508{
3223db20 2509 struct mwifiex_adapter *adapter = priv->adapter;
bf354433
AP		 2510 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp;
2511 struct mwifiex_ie_types_header *tlv;
2512 struct mwifiex_ietypes_chanstats *tlv_stat;
2513 u16 buf_left, type, len;
2514
3223db20
AP		 2515 struct host_cmd_ds_command *cmd_ptr;
2516 struct cmd_ctrl_node *cmd_node;
2517 unsigned long cmd_flags, scan_flags;
2518 bool complete_scan = false;
2519
acebe8c1 2520 mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n");
21445049 2521
bf354433
AP		 2522 ext_scan_resp = &resp->params.ext_scan;
2523
2524 tlv = (void *)ext_scan_resp->tlv_buffer;
2525 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN
2526 - 1);
2527
2528 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) {
2529 type = le16_to_cpu(tlv->type);
2530 len = le16_to_cpu(tlv->len);
2531
2532 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) {
acebe8c1
ZL		 2533 mwifiex_dbg(adapter, ERROR,
2534 "error processing scan response TLVs");
bf354433
AP		 2535 break;
2536 }
2537
2538 switch (type) {
2539 case TLV_TYPE_CHANNEL_STATS:
2540 tlv_stat = (void *)tlv;
2541 mwifiex_update_chan_statistics(priv, tlv_stat);
2542 break;
2543 default:
2544 break;
2545 }
2546
2547 buf_left -= len + sizeof(struct mwifiex_ie_types_header);
2548 tlv = (void *)((u8 *)tlv + len +
2549 sizeof(struct mwifiex_ie_types_header));
2550 }
2551
3223db20
AP		 2552 spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_flags);
2553 spin_lock_irqsave(&adapter->scan_pending_q_lock, scan_flags);
2554 if (list_empty(&adapter->scan_pending_q)) {
2555 complete_scan = true;
2556 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) {
2557 cmd_ptr = (void *)cmd_node->cmd_skb->data;
2558 if (le16_to_cpu(cmd_ptr->command) ==
2559 HostCmd_CMD_802_11_SCAN_EXT) {
acebe8c1
ZL		 2560 mwifiex_dbg(adapter, INFO,
2561 "Scan pending in command pending list");
3223db20
AP		 2562 complete_scan = false;
2563 break;
2564 }
2565 }
2566 }
2567 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, scan_flags);
2568 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, cmd_flags);
2569
2570 if (complete_scan)
2571 mwifiex_complete_scan(priv);
21445049 2572
21f58d20
AK		 2573 return 0;
2574}
2575
2576/* This function This function handles the event extended scan report. It
2577 * parses extended scan results and informs to cfg80211 stack.
2578 */
2579int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv,
2580 void *buf)
2581{
2582 int ret = 0;
2583 struct mwifiex_adapter *adapter = priv->adapter;
2584 u8 *bss_info;
2585 u32 bytes_left, bytes_left_for_tlv, idx;
2586 u16 type, len;
2587 struct mwifiex_ie_types_data *tlv;
2588 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv;
2589 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv;
2590 u8 *radio_type;
2591 u64 fw_tsf = 0;
2592 s32 rssi = 0;
2593 struct mwifiex_event_scan_result *event_scan = buf;
2594 u8 num_of_set = event_scan->num_of_set;
2595 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result);
2596 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size);
2597
2598 if (num_of_set > MWIFIEX_MAX_AP) {
acebe8c1
ZL		 2599 mwifiex_dbg(adapter, ERROR,
2600 "EXT_SCAN: Invalid number of AP returned (%d)!!\n",
2601 num_of_set);
21f58d20
AK		 2602 ret = -1;
2603 goto check_next_scan;
2604 }
2605
2606 bytes_left = scan_resp_size;
acebe8c1
ZL		 2607 mwifiex_dbg(adapter, INFO,
2608 "EXT_SCAN: size %d, returned %d APs...",
2609 scan_resp_size, num_of_set);
868093a9
ZL		 2610 mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf,
2611 scan_resp_size +
2612 sizeof(struct mwifiex_event_scan_result));
21f58d20
AK		 2613
2614 tlv = (struct mwifiex_ie_types_data *)scan_resp;
2615
2616 for (idx = 0; idx < num_of_set && bytes_left; idx++) {
2617 type = le16_to_cpu(tlv->header.type);
2618 len = le16_to_cpu(tlv->header.len);
2619 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) {
acebe8c1
ZL		 2620 mwifiex_dbg(adapter, ERROR,
2621 "EXT_SCAN: Error bytes left < TLV length\n");
21f58d20
AK		 2622 break;
2623 }
2624 scan_rsp_tlv = NULL;
2625 scan_info_tlv = NULL;
2626 bytes_left_for_tlv = bytes_left;
2627
2628 /* BSS response TLV with beacon or probe response buffer
2629 * at the initial position of each descriptor
2630 */
2631 if (type != TLV_TYPE_BSS_SCAN_RSP)
2632 break;
2633
2634 bss_info = (u8 *)tlv;
2635 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv;
2636 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2637 bytes_left_for_tlv -=
2638 (len + sizeof(struct mwifiex_ie_types_header));
2639
2640 while (bytes_left_for_tlv >=
2641 sizeof(struct mwifiex_ie_types_header) &&
2642 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) {
2643 type = le16_to_cpu(tlv->header.type);
2644 len = le16_to_cpu(tlv->header.len);
2645 if (bytes_left_for_tlv <
2646 sizeof(struct mwifiex_ie_types_header) + len) {
acebe8c1
ZL		 2647 mwifiex_dbg(adapter, ERROR,
2648 "EXT_SCAN: Error in processing TLV,\t"
2649 "bytes left < TLV length\n");
21f58d20
AK		 2650 scan_rsp_tlv = NULL;
2651 bytes_left_for_tlv = 0;
2652 continue;
2653 }
2654 switch (type) {
2655 case TLV_TYPE_BSS_SCAN_INFO:
2656 scan_info_tlv =
2657 (struct mwifiex_ie_types_bss_scan_info *)tlv;
2658 if (len !=
2659 sizeof(struct mwifiex_ie_types_bss_scan_info) -
2660 sizeof(struct mwifiex_ie_types_header)) {
2661 bytes_left_for_tlv = 0;
2662 continue;
2663 }
2664 break;
2665 default:
2666 break;
2667 }
2668 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2669 bytes_left -=
2670 (len + sizeof(struct mwifiex_ie_types_header));
2671 bytes_left_for_tlv -=
2672 (len + sizeof(struct mwifiex_ie_types_header));
2673 }
2674
2675 if (!scan_rsp_tlv)
2676 break;
2677
2678 /* Advance pointer to the beacon buffer length and
2679 * update the bytes count so that the function
2680 * wlan_interpret_bss_desc_with_ie() can handle the
2681 * scan buffer withut any change
2682 */
2683 bss_info += sizeof(u16);
2684 bytes_left -= sizeof(u16);
2685
2686 if (scan_info_tlv) {
2687 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi));
2688 rssi *= 100; /* Convert dBm to mBm */
acebe8c1
ZL		 2689 mwifiex_dbg(adapter, INFO,
2690 "info: InterpretIE: RSSI=%d\n", rssi);
21f58d20
AK		 2691 fw_tsf = le64_to_cpu(scan_info_tlv->tsf);
2692 radio_type = &scan_info_tlv->radio_type;
2693 } else {
2694 radio_type = NULL;
2695 }
2696 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
2697 &bytes_left, fw_tsf,
2698 radio_type, true, rssi);
2699 if (ret)
2700 goto check_next_scan;
2701 }
2702
2703check_next_scan:
2704 if (!event_scan->more_event)
2705 mwifiex_check_next_scan_command(priv);
2706
2707 return ret;
2708}
2709
5e6e3a92
BZ		 2710/*
2711 * This function prepares command for background scan query.
2712 *
2713 * Preparation includes -
2714 * - Setting command ID and proper size
2715 * - Setting background scan flush parameter
2716 * - Ensuring correct endian-ness
2717 */
572e8f3e 2718int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
5e6e3a92
BZ		 2719{
2720 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
2721 &cmd->params.bg_scan_query;
2722
2723 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
2724 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
2725 + S_DS_GEN);
2726
2727 bg_query->flush = 1;
2728
2729 return 0;
2730}
2731
5e6e3a92
BZ		 2732/*
2733 * This function inserts scan command node to the scan pending queue.
2734 */
2735void
2736mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
2737 struct cmd_ctrl_node *cmd_node)
2738{
2739 struct mwifiex_adapter *adapter = priv->adapter;
2740 unsigned long flags;
2741
600f5d90 2742 cmd_node->wait_q_enabled = true;
efaaa8b8 2743 cmd_node->condition = &adapter->scan_wait_q_woken;
5e6e3a92
BZ		 2744 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
2745 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
2746 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2747}
2748
5e6e3a92
BZ		 2749/*
2750 * This function sends a scan command for all available channels to the
2751 * firmware, filtered on a specific SSID.
2752 */
2753static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
b9be5f39 2754 struct cfg80211_ssid *req_ssid)
5e6e3a92
BZ		 2755{
2756 struct mwifiex_adapter *adapter = priv->adapter;
dcd5c79c 2757 int ret;
5e6e3a92
BZ		 2758 struct mwifiex_user_scan_cfg *scan_cfg;
2759
600f5d90 2760 if (adapter->scan_processing) {
acebe8c1
ZL		 2761 mwifiex_dbg(adapter, WARN,
2762 "cmd: Scan already in process...\n");
dcd5c79c 2763 return -EBUSY;
5e6e3a92
BZ		 2764 }
2765
600f5d90 2766 if (priv->scan_block) {
acebe8c1
ZL		 2767 mwifiex_dbg(adapter, WARN,
2768 "cmd: Scan is blocked during association...\n");
dcd5c79c 2769 return -EBUSY;
5e6e3a92
BZ		 2770 }
2771
5e6e3a92 2772 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
0d2e7a5c 2773 if (!scan_cfg)
b53575ec 2774 return -ENOMEM;
5e6e3a92 2775
be0b281e
AK		 2776 scan_cfg->ssid_list = req_ssid;
2777 scan_cfg->num_ssids = 1;
5e6e3a92 2778
600f5d90 2779 ret = mwifiex_scan_networks(priv, scan_cfg);
5e6e3a92
BZ		 2780
2781 kfree(scan_cfg);
2782 return ret;
2783}
2784
2785/*
2786 * Sends IOCTL request to start a scan.
2787 *
2788 * This function allocates the IOCTL request buffer, fills it
2789 * with requisite parameters and calls the IOCTL handler.
2790 *
2791 * Scan command can be issued for both normal scan and specific SSID
2792 * scan, depending upon whether an SSID is provided or not.
2793 */
600f5d90 2794int mwifiex_request_scan(struct mwifiex_private *priv,
b9be5f39 2795 struct cfg80211_ssid *req_ssid)
5e6e3a92 2796{
270e58e8 2797 int ret;
5e6e3a92
BZ		 2798
2799 if (down_interruptible(&priv->async_sem)) {
acebe8c1
ZL		 2800 mwifiex_dbg(priv->adapter, ERROR,
2801 "%s: acquire semaphore fail\n",
2802 __func__);
5e6e3a92
BZ		 2803 return -1;
2804 }
5e6e3a92 2805
efaaa8b8 2806 priv->adapter->scan_wait_q_woken = false;
5e6e3a92
BZ		 2807
2808 if (req_ssid && req_ssid->ssid_len != 0)
2809 /* Specific SSID scan */
600f5d90 2810 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
5e6e3a92
BZ		 2811 else
2812 /* Normal scan */
600f5d90
AK		 2813 ret = mwifiex_scan_networks(priv, NULL);
2814
b0e70c2f 2815 up(&priv->async_sem);
600f5d90 2816
5e6e3a92
BZ		 2817 return ret;
2818}
2819
2820/*
2821 * This function appends the vendor specific IE TLV to a buffer.
2822 */
2823int
2824mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
2825 u16 vsie_mask, u8 **buffer)
2826{
2827 int id, ret_len = 0;
2828 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
2829
2830 if (!buffer)
2831 return 0;
2832 if (!(*buffer))
2833 return 0;
2834
2835 /*
2836 * Traverse through the saved vendor specific IE array and append
2837 * the selected(scan/assoc/adhoc) IE as TLV to the command
2838 */
2839 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
2840 if (priv->vs_ie[id].mask & vsie_mask) {
2841 vs_param_set =
2842 (struct mwifiex_ie_types_vendor_param_set *)
2843 *buffer;
2844 vs_param_set->header.type =
2845 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
2846 vs_param_set->header.len =
2847 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
2848 & 0x00FF) + 2);
2849 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
2850 le16_to_cpu(vs_param_set->header.len));
2851 *buffer += le16_to_cpu(vs_param_set->header.len) +
2852 sizeof(struct mwifiex_ie_types_header);
2853 ret_len += le16_to_cpu(vs_param_set->header.len) +
2854 sizeof(struct mwifiex_ie_types_header);
2855 }
2856 }
2857 return ret_len;
2858}
2859
2860/*
2861 * This function saves a beacon buffer of the current BSS descriptor.
2862 *
2863 * The current beacon buffer is saved so that it can be restored in the
2864 * following cases that makes the beacon buffer not to contain the current
2865 * ssid's beacon buffer.
2866 * - The current ssid was not found somehow in the last scan.
2867 * - The current ssid was the last entry of the scan table and overloaded.
2868 */
2869void
2870mwifiex_save_curr_bcn(struct mwifiex_private *priv)
2871{
2872 struct mwifiex_bssdescriptor *curr_bss =
2873 &priv->curr_bss_params.bss_descriptor;
2874
030fe797
AK		 2875 if (!curr_bss->beacon_buf_size)
2876 return;
5e6e3a92 2877
030fe797
AK		 2878 /* allocate beacon buffer at 1st time; or if it's size has changed */
2879 if (!priv->curr_bcn_buf ||
cff23cec 2880 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
5e6e3a92 2881 priv->curr_bcn_size = curr_bss->beacon_buf_size;
5e6e3a92 2882
030fe797 2883 kfree(priv->curr_bcn_buf);
5982b47a 2884 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
cff23cec 2885 GFP_ATOMIC);
0d2e7a5c 2886 if (!priv->curr_bcn_buf)
030fe797 2887 return;
5e6e3a92 2888 }
030fe797
AK		 2889
2890 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
cff23cec 2891 curr_bss->beacon_buf_size);
acebe8c1
ZL		 2892 mwifiex_dbg(priv->adapter, INFO,
2893 "info: current beacon saved %d\n",
2894 priv->curr_bcn_size);
7c6fa2a8
AK		 2895
2896 curr_bss->beacon_buf = priv->curr_bcn_buf;
2897
2898 /* adjust the pointers in the current BSS descriptor */
2899 if (curr_bss->bcn_wpa_ie)
2900 curr_bss->bcn_wpa_ie =
2901 (struct ieee_types_vendor_specific *)
2902 (curr_bss->beacon_buf +
2903 curr_bss->wpa_offset);
2904
2905 if (curr_bss->bcn_rsn_ie)
2906 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2907 (curr_bss->beacon_buf +
2908 curr_bss->rsn_offset);
2909
2910 if (curr_bss->bcn_ht_cap)
2911 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2912 (curr_bss->beacon_buf +
2913 curr_bss->ht_cap_offset);
2914
074d46d1
JB		 2915 if (curr_bss->bcn_ht_oper)
2916 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
7c6fa2a8
AK		 2917 (curr_bss->beacon_buf +
2918 curr_bss->ht_info_offset);
2919
a5f39056 2920 if (curr_bss->bcn_vht_cap)
d5124648
AK		 2921 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf +
2922 curr_bss->vht_cap_offset);
a5f39056
YAP		 2923
2924 if (curr_bss->bcn_vht_oper)
d5124648
AK		 2925 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf +
2926 curr_bss->vht_info_offset);
a5f39056 2927
7c6fa2a8
AK		 2928 if (curr_bss->bcn_bss_co_2040)
2929 curr_bss->bcn_bss_co_2040 =
2c208890 2930 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
7c6fa2a8
AK		 2931
2932 if (curr_bss->bcn_ext_cap)
2c208890
JP		 2933 curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
2934 curr_bss->ext_cap_offset;
a5f39056
YAP		 2935
2936 if (curr_bss->oper_mode)
2937 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
2938 curr_bss->oper_mode_offset);
5e6e3a92
BZ		 2939}
2940
2941/*
2942 * This function frees the current BSS descriptor beacon buffer.
2943 */
2944void
2945mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2946{
2947 kfree(priv->curr_bcn_buf);
2948 priv->curr_bcn_buf = NULL;
2949}
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